Public NTP Secondary (stratum 2) Time Servers

A continuación se mostrará la lista de servidores NTP (Network Time Protocol) públicos de stratum 2

Estan clasificados en dos tipos basicamente (Por nivel de precision):

  • Stratum 1: sincronizan con fuentes de tiempo externas (relojes atómicos o radio-antenas).
  • Stratum 2: sincronizan con los Stratum 1.
  • Stratum n: Sincronizan con Stratum n-1 (siendo “n” 3 en el caso de sincronizar con un Stratum 2).

  1. AR time.sinectis.com.ar (216.244.192.3)

    Location: Sinectis S.A., Buenos Aires (Argentina)

    Geographic Coordinates: 3432’S, 5820’W

    Service Area: Argentina

    Synchronization: NTP V3 secondary (stratum 2), i686/Linux

    Access Policy: open access, please send a message to notify.

    Contact: timekeeper@sinectis.com.ar

    Note: time is an alias and the IP address may change, please use DNS.

  2. AR tick.nap.com.ar (200.49.40.1)

    Location: Network Access Point, Buenos Aires, Argentina

    Synchronization: NTP V3 secondary (stratum 2), Cisco IOS

    Service Area: Argentina

    Access Policy: open access, please send a message to notify

    Contact: Pablo J. Fritz (timekeeper2002@nap.com.ar)

    Note: tick.nap.com.ar is a CNAME

  3. AR tock.nap.com.ar (200.49.40.15)

    Location: Network Access Point, Buenos Aires, Argentina

    Synchronization: NTP V3 secondary (stratum 2), Cisco IOS

    Service Area: Argentina

    Access Policy: open access, please send a message to notify

    Contact: Pablo J. Fritz (timekeeper2002@nap.com.ar)

    Note: tock.nap.com.ar is a CNAME

  4. AU ntp.saard.net (203.21.37.18)

    Location: The University of Adelaide, Adelaide, South AUSTRALIA

    Synchronization: NTP secondary (stratum 2), DEC 3000/300L OSF/1

    Service Area: AARNet

    Access Policy: open access

    Contact: Lachlan Cameron Smith (lachlan.cameronsmith@adelaide.edu.au)

  5. BE ntp1.belbone.be (195.13.23.5)

    Location: Brussels, Belgium

    Synchronization: xntpd (stratum 2), linux/unix

    Service Area: European Union

    Access Policy: open access

    Contact: Belbone NOC (timemaster@belbone.be)

  6. BE ntp2.belbone.be (195.13.1.153)

    Location: Brussels, Belgium

    Synchronization: xntpd (stratum 2), linux/unix

    Service Area: European Union

    Access Policy: open access

    Contact: Belbone NOC (timemaster@belbone.be)

  7. BR ntp.cais.rnp.br (200.144.121.33)

    Location: Brazilian Research Network/Rede Nacional de Pesquisa (RNP)

    Synchronization: NTP V4 Secondary (stratum 2), Sun SPARC10/Solaris,

    Service Area: Brazil

    Access Policy: Open access to stratum 2 and stratum 3 NTP servers. Please, send a mail to notify.

    Contact: ntp-admin@cais.rnp.br

  8. BR ntp.hiway.com.br (200.246.53.5)

    Location: Brazil, SP, Valinhos (near Sao Paulo) Hiway Internet Provider Valinhos

    Geographic Coordinates: 22:58:22.4S 47:00:19.7W / Alt +729m (GPS WGS84)

    Synchronization: NTP V4 Secondary (stratum 2), Linux i586, NTPd v.4.1.71

    Service Area: Brazil

    Access Policy: Open access. Please, send a mail to notify.

    Contact: Fernando Braghetto, webmaster@hiway.com.br, 55 19 38694300

    Note: IP address are subject to change; use DNS

  9. BR ntp.massayonet.com.br (200.254.135.2)

    Location: Telemacro Sistemas e Serviços

    Synchronization: NTP V4 Secondary (stratum 2), OpenBSD 3.4

    Service Area: Brazil

    Access Policy: Open access to stratum 2 and stratum 3 NTP servers.

    Please send a mail to notify
    Contact: ntp@massayonet.com.br

  10. BR ntp.pop-pr.rnp.br (200.19.74.21)

    Location: PoP-PR/Brazilian Research Network (RNP)

    Synchronization: NTP V4 Secondary (stratum 2), IBM RS6000 – 43P-240 /Debian GNU Linux

    Service Area: Brazil

    Access Policy: Open access to stratum 2 server. Please, send a mail to notify.

    Contact: ntp-admin@pop-pr.rnp.br

  11. BR ntp.ufes.br (200.137.65.132)

    Location: POP-ES Federal University of Espirito Santo / POP-ES

    Universidade Federal do Espirito Santo (UFES)

    Synchronization: NTP V4 Secondary (stratum 2), AIX 4

    Service Area: Brazil

    Access Policy: Open access to stratum 2 and stratum 3 NTP servers. Please, send a mail to notify.

    Contact: ntp-admin@ufes.br

  12. BR ntp1.pucpr.br (200.192.112.8)

    Location: Brazilian / Pontificia Universidade Catolica do Parana

    Synchronization: NTP V4 secondary (stratum 2),

    Sun SPARC4/Solaris 7

    Service =C1rea: Brazil

    Access Policy:open access to stratum 2 server

    Contact: ntp1@pucpr.br

  13. CA ntp.cpsc.ucalgary.ca (136.159.2.2)

    Location: University of Calgary, Calgary, Alberta, Canada

    Synchronization: NTP V4 Secondary, i686/Solaris

    Service Area: Canada

    Access Policy: open access

    Contact: Brad Arlt (timekeeper@cpsc.ucalgary.ca)

  14. CA ntp1.cmc.ec.gc.ca

    Location: Canadian Meteorological Centre, Dorval, Québec, Canada

    Synchronization: NTP V4 secondary SGI/Unix

    Service Area: Eastern Canada

    Access Policy: open access

    Contact: ( ntp-admin@cmc.ec.gc.ca)

  15. CA ntp2.cmc.ec.gc.ca

    Location: Canadian Meteorological Centre, Dorval, Québec, Canada

    Synchronization: NTP V4 secondary SGI/Unix

    Service Area: Eastern Canada

    Access Policy: open access

    Contact: ( ntp-admin@cmc.ec.gc.ca)

  16. CA tick.utoronto.ca (128.100.103.252)

    Location: University of Toronto, Toronto, Ontario, CANADA

    Synchronization: NTP V3 secondary (stratum 2), Sparc 10, Solaris 2.5.1

    Service Area: Eastern Canada

    Access Policy: open access, send email to notify.

    Contact: Russell Sutherland (russ@madhaus.cns.utoronto.ca)

    Note: IP addresses are subject to change; please use DNS

  17. CA time.chu.nrc.ca (209.87.233.53)

    Location: National Research Council of Canada, Ottawa, Ontario, Canada

    Geographic Coordinates: 45:17:41N, 75:45:27W

    Synchronization: NTP V3 secondary (stratum 2), PC/Linux

    Service Area: Canada

    Access Policy: open access

    Contact: time@nrc.ca

    Note: IP address subject to change; please use DNS.

  18. CA time.nrc.ca (132.246.168.148)

    Location: National Research Council of Canada, Ottawa, Ontario, Canada

    Geographic Coordinates: 45:27N, 75:37W

    Synchronization: NTP V3 secondary (stratum 2), PC/Linux

    Service Area: Canada

    Access Policy: open access

    Contact: time@nrc.ca

    Note: time is an alias and the IP address may change; please use DNS.

  19. CA timelord.uregina.ca (142.3.100.15)

    Location: University of Regina, Regina, Saskatchewan, Canada

    Geographic Coordinates: 50:25N , 104:35:20 W

    Synchronization: NTP V3 secondary (stratum 2), Sun Sparc 5

    Service Area: SASK#net, CA*net, Canada

    Access Policy: open access

    Contact: Mark Haidl (timekeeper@uregina.ca)

    Note: please limit to one or two hosts per site.

  20. CA tock.utoronto.ca (128.100.100.128)

    Location: University of Toronto, Toronto, Ontario, CANADA

    Synchronization: NTP V3 secondary (stratum 2), Sparc 5, Solaris 2.5

    Service Area: Eastern Canada

    Access Policy: open access, send email to notify.

    Contact: Russell Sutherland (russ@madhaus.cns.utoronto.ca)

    Note: IP addresses are subject to change; please use DNS

  21. CZ ntp.cgi.cz (81.0.239.181)

    Location: Prague, The Czech Republic

    Synchronization: NTP V4 secondary (stratum 2), PC/FreebSD

    Service Area: Czech Republic

    Access Policy: open access

    Contact: Jakub Chromy (helpdesk@cgi.cz)

    Note: ntp is an alias and the IP address may change; please use DNS.

  22. CZ ntp.globe.cz (81.95.96.3)

    Location: Prague, The Czech Republic

    Synchronization: NTP V4 secondary (stratum 2), PC/Linux

    Service Area: Czech Republic

    Access Policy: open access

    Contact: Jan Panoch (panoch.jan@globe.cz)

    Note: ntp is an alias and the IP address may change; please use DNS.

  23. CZ ntp.karpo.cz (217.11.227.68)

    Location: Prague, The Czech Republic

    Synchronization: NTP V4 secondary (stratum 2), PC/Linux

    Service Area: Czech Republic

    Access Policy: open access

    Contact: Karel Zvara (zvara@karpo.cz)

    Note: ntp is an alias and the IP address may change; please use DNS.

  24. CZ ntp1.contactel.cz (212.65.193.3)

    Location: Prague, The Czech Republic

    Synchronization: NTP V4 secondary (stratum 2), PC/Linux

    Service Area: Czech Republic

    Access Policy: open access

    Contact: Contactel hostmasters (hostmaster@ctt.cz)

    Note: ntp1.contactel.cz is an alias and the IP address may change; please use DNS.

  25. CZ ntp2.contactel.cz (212.65.193.4)

    Location: Prague, The Czech Republic

    Synchronization: NTP V4 secondary (stratum 2), PC/Linux

    Service Area: Czech Republic

    Access Policy: open access

    Contact: Contactel hostmasters (hostmaster@ctt.cz)

    Note: ntp1.contactel.cz is an alias and the IP address may change; please use DNS.

  26. DE tick.fh-augsburg.de (141.82.30.251)

    Location: Augsburg University of Applied Sciences (FH), Augsburg, Bavaria, Germany

    Synchronization: NTP V3 secondary (stratum 2), i486/Linux

    Service area: Germany, Europe, European academic community

    Access policy: please check the details at our website

    Contact: Burkhard Erdlenbruch (erd@rz.fh-augsburg.de)

  27. DE tock.fh-augsburg.de (141.82.30.252)

    Location: Augsburg University of Applied Sciences (FH), Augsburg, Bavaria, Germany

    Synchronization: NTP V3 secondary (stratum 2), i486/Linux

    Service area: Germany, Europe, European academic community

    Access policy: please check the details at our website

    Contact: Burkhard Erdlenbruch (erd@rz.fh-augsburg.de)

  28. DE tack.fh-augsburg.de (141.82.30.253)

    Location: Augsburg University of Applied Sciences (FH), Augsburg, Bavaria, Germany

    Synchronization: NTP V4 secondary (stratum 2), i486/Linux

    Service area: Germany, Europe, European academic community

    Access policy: please check the details at our website

    Contact: Burkhard Erdlenbruch (erd@rz.fh-augsburg.de)

  29. ES hora.oxixares.com [217.127.2.161]

    Location: Ogijares (Granada/SPAIN)

    Synchronization: ntp v4.1.1 secondary (stratum 2)/athlon XP 2500+/SuSE Linux 8.2

    Service Area: Spain

    Access Policy: Public (glad to receive a note)

    Contact: timekeeper@oxixares.com

  30. ES slug.ctv.es [194.179.52.14] (will add an alias for this purpose)

    Location: Altea (Alicante/SPAIN)

    Synchronization: Stratum-2/i486DX2/66/Linux

    Service Area: Spain

    Access Policy: Public (glad to receive a note)

    Contact: Luis Colorado (luis.colorado@slug.ctv.es)

  31. FI tick.keso.fi (194.137.39.67)

    Location: Keski-Savon Oppimiskeskus, Pieksamaki, Finland, Europe

    Synchronization: NTP-3, i686/Linux

    Service area: Finland

    Access policy: open access, please send a message to notify

    Contact: root@keso.fi

    Note: tick is an alias, please use DNS

  32. FI tock.keso.fi (194.137.39.68)

    Location: Keski-Savon Oppimiskeskus, Pieksamaki, Finland, Europe

    Synchronization: NTP-3, i586/Linux

    Service area: Finland

    Access policy: open access, please send a message to notify

    Contact: root@keso.fi

    Note: tock is an alias, please use DNS

  33. FR ntp.ndsoftwarenet.com

    Location: NDSoftware, Paris, France

    Synchronization: NTP secondary (stratum 2)

    Service area: World

    Access policy: open access, please send a message to notify

    Contact: NDSoftware NTPmaster (ntpmaster@ndsoftwarenet.com)

    Note: IP address subject to change; please use DNS.

  34. FR ntp.obspm.fr

    Location: BNM-SYRTE, Observatoire de Paris, Paris, France

    Synchronization: NTP V4 secondary (stratum-2), i386/Linux

    Service Area: France/Europe

    Access Policy: open access, but please send a message to notify

    Contact: info.bnm-syrte@obspm.fr, More Informations?

    Note: use DNS for IP address.

  35. FR ntp.tuxfamily.net

    Location: SFINX or TeleHouse2, Paris, France

    Synchronization: NTP V4 secondary (stratum-2), Debian GNU/Linux ix86

    Service Area: France/Europe

    Access Policy: open access, no need to notify

    Contact: ntp-adm@tuxfamily.net, More Informations ?

    Note: use DNS for IP address

    Note: ntp.tuxfamily.net is an alias for ntp1.tuxfamily.net and ntp2.tuxfamily.net

    Note: see ntp{1,2}.tuxfamily.net entries for more information

  36. FR ntp1.tuxfamily.net (80.67.177.2)

    Location: SFINX, Paris, France

    Synchronization: NTP V4 secondary (stratum-2), Debian GNU/Linux ix86

    Service Area: France/Europe

    Access Policy: open access, no need to notify

    Contact: ntp-adm@tuxfamily.net, More Informations ?

    Note: use DNS for IP address is recommended

    Note: peer with ntp2.tuxfamily.net

    Note: If you use this service reguraly, you should subscribe to ntp@tuxfamily.org

  37. FR ntp2.tuxfamily.net (80.67.179.2)

    Location: TeleHouse2, Paris, France

    Synchronization: NTP V4 secondary (stratum-2), Debian GNU/Linux ix86

    Service Area: France/Europe

    Access Policy: open access, no need to notify

    Contact: ntp-adm@tuxfamily.net, More Informations ?

    Note: use DNS for IP address is recommended

    Note: peer with ntp1.tuxfamily.net

    Note: If you use this service reguraly, you should subscribe to ntp@tuxfamily.org

  38. FR ntp.univ-lyon1.fr (134.214.100.6)

    Location: CISM, Lyon, France

    Synchronization: NTP V3 secondary (stratum 2), Sun SS10

    Service Area: France, Switzerland, Italy, Europe

    Access Policy: open access

    Contact: ntp-adm@univ-lyon1.fr

    Note: consult DNS to get host address, ntp is an alias.

    Note: we would appreciate getting a little note if you make regular use of this server, so that we can put you on our NTP mailing-list.

  39. FR ntp.via.ecp.fr (138.195.130.71)

    Location: VIA, Ecole Centrale Paris, France

    Synchronization: ntp v4.0.99c (stratum 2), Debian GNU/Linux x86

    Service Area: France/Europe

    Policy: open access, send email to notify. Please limit access to one or two hosts per site (large sites should set up their own ntp server)

    Contact: ntpadmin@via.ecp.fr

  40. GR ntp.mfa.gr (193.92.123.152)

    Location: Athens, GR

    Service Area: Greece

    Synchronization: NTP V3 secondary (stratum 2), i686/FreeBSD

    Access Policy: open access/GR, please send a message to notify.

    Contact: ntp@mfa.gr

    Note: "ntp" is an alias and the IP address may change, please use DNS.

  41. GR ntp.mikros.com (213.5.174.2)

    Location: Argostoli, Kefalonia, GR

    Geographic Coordinates: 3810N 2030E

    Service Area: Greece

    Synchronization: NTP V3 secondary (stratum 2), i686/Linux

    Access Policy: open access/GR, please send a message to notify.

    Contact: ntp@mikroskosmos.com

    Note: "ntp" is an alias and the IP address may change, please use DNS.

  42. HK ntp.cuhk.edu.hk

    Location: The Chinese University of Hong Kong.

    Geographic Coordinates: 22:25:10N, 114:12:22E

    Synchronization: NTP V3 secondary (stratum 2), i686/Linux

    Service Area: Hong Kong, Taiwan, China, and South East Asia

    Access Policy: open access

    Contact: Connie Law (connieL@cuhk.edu.hk), <kinming@cuhk.edu.hk> Note: IP addresses are subject to change; please use DNS

  43. HR zg1.ntp.carnet.hr (161.53.2.70)

    Location: CARNet (Croatian Academic and Research Network), Zagreb, Croatia

    Synchronization: NTP V4 secondary (stratum 2), Sun Sparc/Solaris

    Service Area: Croatia/Europe

    Access Policy: open access, glad to receive a note

    Contact: ntp@carnet.hr

    Note: IP address subject to change; better use DNS

  44. HR zg2.ntp.carnet.hr (161.53.123.4)

    Location: CARNet (Croatian Academic and Research Network), Zagreb, Croatia

    Synchronization: NTP V4 secondary (stratum 2), Sun Sparc/Solaris

    Service Area: Croatia/Europe

    Access Policy: open access, glad to receive a note

    Contact: ntp@carnet.hr

    Note: IP address subject to change; better use DNS

  45. HR st.ntp.carnet.hr (161.53.30.3)

    Location: CARNet (Croatian Academic and Research Network), Split, Croatia

    Synchronization: NTP V4 secondary (stratum 2), Sun Sparc/Solaris

    Service Area: Croatia/Europe

    Access Policy: open access, glad to receive a note

    Contact: ntp@carnet.hr

    Note: IP address subject to change; better use DNS

  46. HR ri.ntp.carnet.hr (161.53.40.3)

    Location: CARNet (Croatian Academic and Research Network), Rijeka, Croatia

    Synchronization: NTP V4 secondary (stratum 2), Sun Sparc/UNIX

    Service Area: Croatia/Europe

    Access Policy: open access, glad to receive a note

    Contact: ntp@carnet.hr

    Note: IP address subject to change; better use DNS

  47. HR os.ntp.carnet.hr (161.53.200.8)

    Location: CARNet (Croatian Academic and Research Network), Osijek, Croatia

    Synchronization: NTP V4 secondary (stratum 2), Sun Sparc/Solaris

    Service Area: Croatia/Europe

    Access Policy: open access, glad to receive a note

    Contact: ntp@carnet.hr

    Note: IP address subject to change; better use DNS

  48. HU time.kfki.hu (148.6.0.1)

    Location: KFKI Research Institute for Particle and Nuclear Physics, Budapest, Hungary

    Synchronization: NTP secondary (stratum 2), Sun/Solaris

    Service Area: HUNGARNET

    Access Policy: open access, send email to notify.

    Contact: time@sunserv.kfki.hu

  49. ID ntp.incaf.net (202.180.0.71)

    Location: Jakarta, Indonesia

    Synchronization: NTP V4 Secondary, i686/Linux

    Service Area: Indonesia

    Access Policy: open access

    Contact: admin (timekeeper@incaf.net)

  50. IE ntp.maths.tcd.ie

    Location: School of Mathematics, Trinity College, Dublin, Ireland.

    Synchronization: NTPV4 secondary (stratum 2), Intel, FreeBSD 2.2

    Service Area: Ireland, UK

    Access Policy: open access, please send a message to notify.

    Contact: time@maths.tcd.ie

    Note: ntp.cs.tcd.ie, ntp.maths.tcd.ie and ntp.tcd.ie peer together over local area net. It is normally sufficient just to pick one machine to peer with.

  51. IT ntps.net4u.it (80.83.192.129)

    Location: 4u Srl, Vercelli, Italy

    Synchronization: NTP secondary (stratum 2), Linux 2 on Intel PIII 500MHz

    Service area: Italy

    Access policy: open access, please send a message to notify

    Contact: timemaster@net4u.it

  52. JP ntp.cyber-fleet.net

    Location: Cyber Fleet, Inc., Tokyo, Japan

    Geographic Coordinates: 35:43:59N, 139:40:50E

    Synchronization: NTP V4 secondary (stratum 2), PC BSD/OS

    Service Area: Japan/East Asia

    Access policy: open access, please send a message to notify

    Contact: pdp@cyber-fleet.net

    Note: the IP address may change, please use DNS

    Note: IPv4/IPv6 available.

  53. KR ntp.ewha.net [211.39.143.103]

    Location: KT-IDC, Bundang, Korea

    Geographic Coordinates: 37:24:45.3N 127:07:28.5E (WGS 84)

    Synchronization: NTP V3 (stratum 2), i586/Linux

    Service area: Korea

    Access policy: Open access within Korea, send email to notify. Please limit access to one or two hosts per site (large sites should set up their own ntp server)

    Contact: ntp@ewha.net

    Note: IP addresses are subject to change; please use DNS

  54. MX ntp2a.audiotel.com.mx (200.34.146.67)

    Location: Audiotel office, Mexico D.F., Mexico

    Synchronization: NTP V3 secondary (stratum 2), NeXTstation/33

    Service Area: Avantel, MCINet, Mexico

    Access Policy: open access, but please send a message to notify.

    Contact: Pedro Resendiz (resendiz@audiotel.com.mx)

  55. MX ntp2b.audiotel.com.mx (200.34.146.68)

    Location: Audiotel office, Mexico D.F., Mexico

    Synchronization: NTP V3 secondary (stratum 2), NeXTstation/33

    Service Area: Avantel, MCINet, Mexico

    Access Policy: open access, but please send a message to notify.

    Contact: Pedro Resendiz (resendiz@audiotel.com.mx)

  56. MX ntp2c.audiotel.com.mx (200.34.146.69)

    Location: Audiotel office, Mexico D.F., Mexico

    Synchronization: NTP V3 secondary (stratum 2), NeXTstation/33

    Service Area: Avantel, MCINet, Mexico

    Access Policy: open access, but please send a message to notify.

    Contact: Pedro Resendiz (resendiz@audiotel.com.mx)

  57. MY ntp.doubleukay.com

    Location: Cyberjaya, Malaysia

    Synchronization: NTP V4 secondary (stratum 2), Intel/Linux

    Service Area: Malaysia

    Access Policy: open access

    Contact: Woon Wai Keen (timekeeper@doubleukay.com)

  58. NG ntp.supernet300.com (216.72.109.4)

    Location: Supernet300, Lagos, Nigeria

    Synchronization: NTP secondary (stratum 2), PC/Linux

    Service Area: Western Africa, primarily Nigerian NITEL backbone

    Access Policy: Open access, please send an email to notify before use.

    Contact: timelords@supernet300.com

    Note: Please use the DNS name-the IP address can (and likely will) change.

  59. NL ntp1.theinternetone.net (62.4.94.221)

    Location: The Internetone, Abovenet Amsterdam, The Netherlands

    Synchronization: NTP V4 secondary (stratum 2), i686/Linux

    Service Area: Netherlands/Europe, Abovenet

    Access Policy: open access, please send a message to notify

    Contact: Cees de Groot (cg@theinternetone.net)

    Note: please choose one of ntp{1,2,3}.theinternetone.net. Use DNS, addresses subject to change

  60. NL ntp2.theinternetone.net (62.4.94.8)

    Location: The Internetone, Abovenet Amsterdam, The Netherlands

    Synchronization: NTP V4 secondary (stratum 2), i686/Linux

    Service Area: Netherlands/Europe, Abovenet

    Access Policy: open access, please send a message to notify

    Contact: Cees de Groot (cg@theinternetone.net)

    Note: please choose one of ntp{1,2,3}.theinternetone.net. Use DNS, addresses subject to change

  61. NL ntp3.theinternetone.net (62.4.94.210)

    Location: The Internetone, Abovenet Amsterdam, The Netherlands

    Synchronization: NTP V4 secondary (stratum 2), i686/Linux

    Service Area: Netherlands/Europe, Abovenet

    Access Policy: open access, please send a message to notify

    Contact: Cees de Groot (cg@theinternetone.net)

    Note: please choose one of ntp{1,2,3}.theinternetone.net. Use DNS, addresses subject to change

  62. NO fartein.ifi.uio.no (129.240.64.3)

    Location: University of Oslo, Norway

    Geographic Coordinates: 59:56:32N, 10:43:22E

    Synchronization: NTP secondary (stratum 2), DEC Alpha OSF/1 V4.0

    Service Area: NORDUnet

    Access Policy: open access

    Contact: timekeeper@ifi.uio.no)

  63. NO time.alcanet.no (use DNS)

    Location: Alcanet International, Oslo, Norway

    Synchronization: NTP V3 secondary (stratum 2), PC/Linux

    Service Area: Europe=20

    Access Policy: open access, notify message appreciated

    Contact: timekeeper@alcanet.no

  64. NZ ntp.iprolink.co.nz (use DNS)

    Location: Iprolink, CBD, Auckland, New Zealand

    Geographic coordinates: 36:50:59.6 S, 174:45:31.9 E, (GPS NZ Geodatum 1949)

    Synchronisation: NTP V3 (stratum 2), Cisco Router

    Service Area: New Zealand

    Access Policy: Open access within New Zealand, send email to notify.

    Contact: ntp@iprolink.co.nz

    Note: IP addresses are subject to change; please use DNS

  65. NZ ntp.massey.ac.nz (Use DNS)

    Location: Massey University, Palmerston North, New Zealand

    Synchronisation: NTP V4 (stratum 2), PC/Linux

    Service Area: New Zealand

    Access Policy: Open access within New Zealand

    Contact: ntp@massey.ac.nz

    Note: if multiple servers are required, use ntp1 and ntp2

  66. NZ ntp.public.otago.ac.nz (139.80.64.114)

    Location: University of Otago, Dunedin, New Zealand

    Synchronisation: NTP V3 (stratum 2), Linux on Intel

    Service Area: New Zealand

    Access Policy: Open access within New Zealand, send email to notify.

    Contact: ntp@otago.ac.nz

    Note: IP addresses are subject to change; please use DNS

  67. NZ tk1.ihug.co.nz, tk2.ihug.co.nz, tk3.ihug.co.nz (use DNS)

    Location: ihug, Central city, Auckland, New Zealand

    Synchronisation: NTP V4 (stratum 2), PC/Linux

    Service Area: New Zealand

    Access Policy: Open access within New Zealand, send email to notify.

    Contact: ntp@staff.ihug.co.nz

    Note: IP addresses are subject to change; please use DNS

  68. PL info.cyf-kr.edu.pl: 149.156.4.11

    Location: Academic Computer Centre, CYFRONET, Krakow, Poland

    Synchronization: NTP V3 secondary (stratum 2), HP/Unix

    Service Area: Poland/Europe

    Access policy: open access, please send a message to notify

    Contact: Jerzy.Pawlus@cyf-kr.edu.pl

  69. PT bug.fe.up.pt (193.136.54.1)

    Location: Oporto University, Portugal

    Synchronization: NTP secondary (stratum 2), i486/Linux

    Service Area: Portugal/Europe

    Access Policy: For use only by prior arrangement. Mail

    timemaster@bug.fe.up.pt for more information.

  70. RO ntp.ip.ro (212.93.129.107)

    Location: IP Bucharest, Romania

    Synchronization: NTP V3, Linux/i586

    Service Area: Romania/Europe

    Access Policy: open access, but please send a message to notify

    Contact: ntp@ntp.ip.ro

    Note: use DNS for IP address.

  71. RU ntp.psn.ru (194.149.67.130)

    Location: Pushchino, Moscow region, Russia

    Geographic Coordinates: 54:50N, 37:37E

    Synchronization: NTP secondary (stratum 2), Alpha/Linux

    Service area: Russia

    Access policy: open access, please send a message to notify

    Contact: clockmaster@psn.ru

  72. RU sign.chg.ru (193.233.46.10)

    Location: Scientific Center in Chernogolovka, Moscow region, Russia

    Synchronization: NTP V3 secondary (stratum 2), PC/FreeBSD 3.1

    Service Area: Russia

    Access Policy: open access, please send e-mail to notify.

    Contact: Andrew Neporada (andrew@chg.ru) or time@sign.chg.ru

  73. SE ntp.lth.se (130.235.20.3)

    Location: Lund Institute of Technology, Lund, Sweden

    Synchronization: NTP V3 secondary (stratum 2), Sun/Solaris

    Service Area: Sweden, NORDUnet

    Access Policy: open access, send email to notify. Please limit access to one or two hosts per site (large sites should set up their own ntp server)

    Contact: timemaster@lth.se

  74. SE time.flygplats.net

    Location: flygplats.net, Sigtuna, Sweden

    Synchronization: NTP V4 secondary, i386, FreeBSD

    Service Area: Europe

    Access Policy: Open access

    Contact: timekeeper;@flygplats.net

    Note: IP address subject to change; please use DNS.

  75. SG ntp.shim.org

    Location: Singapore

    Synchronization: NTP secondary (stratum 2), Intel/Linux

    Service Area: Singapore

    Access Policy: open access

    Contact: Dr Ivan Shim

  76. SI biofiz.mf.uni-lj.si (193.2.69.10)

    Location: Institute of Biophysics, University of Ljubljana, Slovenia

    Geographic Coordinates: 46:03:09N, 14:30:40E

    Synchronization: NTP V4 secondary (stratum 2), IBM/Linux

    Service Area: Slovenia/Europe

    Access Policy: open access, please send a message to notify

    Contact: Primoz Peterlin (time@biofiz.mf.uni-lj.si)

  77. SI ntp1.arnes.si (193.2.1.66)

    Location: ARNES (Academic and Research Network of Slovenia), Ljubljana, Slovenia

    Synchronization: NTP V4 secondary (stratum 2), Sun Sparc/Solaris

    Service Area: Slovenia/Europe

    Access Policy: open access with some restrictions (see http://www.arnes.si/english/ntp_access.html)

    Contact: ntp-admin@arnes.si

    Note: IP address subject to change; better useDNS

  78. SI ntp2.arnes.si (193.2.1.92)

    Location: ARNES (Academic and Research Network of Slovenia), Ljubljana, Slovenia

    Synchronization: NTP V4 secondary (stratum 2), Sun Sparc/Solaris

    Service Area: Slovenia/Europe

    Access Policy: open access with some restrictions (see http://www.arnes.si/english/ntp_access.html)

    Contact: ntp-admin@arnes.si

    Note: IP address subject to change; better use DNS

  79. SI time.ijs.si (193.2.4.6)

    Location: J. Stefan Institute, Ljubljana, Slovenia

    Geographic Coordinates: 46:02:35N, 14:29:17E (WGS84)

    Synchronization: NTP V4 secondary (stratum 2), DEC Alpha / Digital Unix

    Service Area: Slovenia/Europe

    Access Policy: open access, glad to receive a note

    Contact: Mark Martinec (timekeeper@ijs.si)

    Note: IP address subject to change; better use DNS

  80. SI time.ijs.si (193.2.4.6)

    Location: J. Stefan Institute, Ljubljana, Slovenia

    Geographic Coordinates: 46° 2.517’N, 14° 29.241’E (WGS84)

    Synchronization: NTP V4 secondary (stratum 2), Compaq (DEC) Alpha / Tru64 Unix with MICRO_TIME kernel option

    Service Area: Slovenia/Europe

    Access Policy: open access, glad to receive a note

    Contact: Mark Martinec (timekeeper@ijs.si); More info?

    Note: IP address subject to change; better use DNS

  81. SV clock.cimat.ues.edu.sv (168.243.7.66)

    Location: Faculty of Natural Sciences and Mathematics, University of El Salvador, San Salvador, El Salvador

    Synchronization: NTP V4 secondary (stratum 2), PC/Linux

    Service Area: Central America

    Access Policy: open access, please send a message to notify

    Contact: (admin@cimat.ues.edu.sv)

    Note: clock.cimat.ues.edu.sv is a CNAME

  82. UK a.ntp.alphazed.net (212.42.1.207)

    Location: Telehouse, London E14

    Synchronization: NTP 4, FreeBSD

    Service Area: all areas

    Access Policy: open access

    Contact: ntp@alphazed.com

    Note: Please check http://www.alphazed.co.uk/support/ntp.php

  83. TR time.deu.edu.tr (193.140.151.9)

    Location: Dokuz Eylul University, Izmir, Turkey

    Synchronization: NTP V4 Secondary (stratum 2), Sun SPARC10/Solaris,

    Service Area: Turkey

    Access Policy: Open access Please, send a mail to notify.

    Contact: berent@deu.edu.tr

    Note: IP address are subject to change; please use DNS

  84. UK bear.zoo.bt.co.uk (132.146.236.132)

    Location: BT Adastral Park, Ipswich, England

    Synchronisation: NTP Secondary, PentiumIII/Linux 2.4

    Service Area: UK

    Access Policy: Open Access

    Contact: John Sager, jcs@zoo.bt.co.uk

    Note: WYSIWYG. No service guarantee, so don’t use it as your sole sync source.

  85. UK ntp.cis.strath.ac.uk

    Location: Dept. Computer and Information Sciences, University of Strathclyde, Glasgow, Scotland.

    Geographic Coordinates: 04:14W, 55:52N

    Synchronization: NTP V4 secondary

    Service Area: UK/Europe

    Access Policy: open access

    Contact: Ian Gordon (ntp@cis.strath.ac.uk)

    Note: Do not use IP address because these can change

  86. UK ntp.exnet.com (194.207.34.9)

    Location: ExNet Ltd, London, UK

    Synchronization: NTP secondary (stratum 2), Sun-4/Unix

    Service area: UK/Europe/any

    Access policy: semi-open access, please send message first for access

    Contact: sysadmin@exnet.com or dhd@exnet.com

    Note: Please see our Web page before using. Please use CNAME ntp.exnet.com since IP address may well change.

  87. UK ntp2a.mcc.ac.uk (130.88.202.49)

    Location: University of Manchester, Manchester, England

    Synchronization: NTP secondary (S2), Sun/SunOS

    Service Area: UK

    Access Policy: Open Access

    Contact(s): timelords@mcc.ac.uk

    Note: Please use DNS for address, subject to change

  88. UK ntp2b.mcc.ac.uk (130.88.200.98)

    Location: University of Manchester, Manchester, England

    Synchronization: NTP secondary (S2), PC/FreeBSD

    Service Area: UK

    Access Policy: Open Access

    Contact(s): timelords@mcc.ac.uk

    Note: Please use DNS for address, subject to change

  89. UK ntp2c.mcc.ac.uk (130.88.200.4)

    Location: University of Manchester, Manchester, England

    Synchronization: NTP secondary (S2), PC/FreeBSD

    Service Area: UK

    Access Policy: Open Access

    Contact(s): timelords@mcc.ac.uk

    Note: Please use DNS for address, subject to change

  90. UK ntp2d.mcc.ac.uk (130.88.203.12)

    Location: University of Manchester, Manchester, England

    Synchronization: NTP secondary (S2), SGI/Irix

    Service Area: UK

    Access Policy: Open Access

    Contact(s): timelords@mcc.ac.uk

    Note: Please use DNS for address, subject to change

  91. UK ntp{0|1|2}.sandvika.net (194.164.127.{4|5|6})

    Location: Telehouse Europe, London E14.

    Geographic Coordinates: 51°30.71’N 0°00.08’W

    Synchronisation: NTP V4 secondary Sun UltraSPARC Solaris 8

    Service area: UK / Europe

    Contact: time@sandvika.net

    Note: www.sandvika.net/time (ntp2 new – due online mid-October 2002).

  92. UK ntp0.uk.uu.net 158.43.128.33

    Configuration: NTP V3 secondary (stratum 2), Sun sparc Ultra, Solaris 7, xntpd 3-5.93

    Location: Cambridge, UK

    Service Area: UUNET (formerly known in the UK as PIPEX); UK

    Access Policy: Semi-open access. These are primarily for use by UUNET customers who may use them without asking, but others are welcome to peer if they give notice.

    Contact: timelord@uk.uu.net

    Note: This service is supported on a best-effort basis, but is not guaranteed. UUNET customers should peer with all three: ntp0.uk.uu.net, ntp1.uk.uu.net, and ntp2.uk.uunet.

  93. UK ntp1.uk.uu.net 158.43.128.66

    Configuration: NTP V3 secondary (stratum 2), Sun sparc Ultra, Solaris 7, xntpd 3-5.93

    Location: Cambridge, UK

    Service Area: UUNET (formerly known in the UK as PIPEX); UK

    Access Policy: Semi-open access. These are primarily for use by UUNET customers who may use them without asking, but others are welcome to peer if they give notice.

    Contact: timelord@uk.uu.net

    Note: This service is supported on a best-effort basis, but is not guaranteed. UUNET customers should peer with all three: ntp0.uk.uu.net, ntp1.uk.uu.net, and ntp2.uk.uunet.

  94. UK ntp2.uk.uu.net 158.43.192.66

    Configuration: NTP V3 secondary (stratum 2), Sun sparc Ultra, Solaris 7, xntpd 3-5.93

    Location: London, UK

    Service Area: UUNET (formerly known in the UK as PIPEX); UK

    Access Policy: Semi-open access. These are primarily for use by UUNET customers who may use them without asking, but others are welcome to peer if they give notice.

    Contact: timelord@uk.uu.net

    Note: This service is supported on a best-effort basis, but is not guaranteed. UUNET customers should peer with all three: ntp0.uk.uu.net,

  95. UK tick.tanac.net (195.112.34.51)

    Location: Wibble UK, Aylesbury, Buckinghamshire UK

    Synchronization: NTP secondary (stratum 2), i686/Linux 2.2

    Geographic Coordinates: 51 49 00 N 00 48 00 W

    Service area: United Kingdom

    Access policy: open access, please send a message to notify

    Contact: ntp@tanac.net

  96. UK; time-server.ndo.com (195.7.224.135)

    Location: Telehouse Metro, London EC2A.

    Geographic Coordinates: 51°31.21’N 0°05.01’W

    Synchronisation: NTP secondary, PC/Debian Linux

    Service area: UK / Europe

    Access Policy: Open Access

    Contact: support@ndo.com

  97. US * time.cachenetworks.com (no address, please use dns)

    Location: Multiple, United States

    Synchronization: NTP V4 secondary (stratum 2)

    Service area: US/any

    Access policy: open access, please send a message to notify

    Contact: Matt Levine (matt.levine@cachenetworks.com)

    Note: service is (unicast) anycasted in multiple locations.

  98. US AR sushi.compsci.lyon.edu (150.208.72.154)

    Location: Lyon College Computer Science (Batesville, Arkansas USA)

    Geographic Coordinates: 35.776N, 91.629W

    Service Area: United States

    Synchronization: NTP V4 secondary (stratum 2)

    Access Policy: open access, please send a message to notify.

    Contact: Matt Critcher (timekeeper@compsci.lyon.edu)

    Note: IP’s may change. Please use DNS.

  99. US AZ decimal.lib.ci.phoenix.az.us (148.167.132.201)

    Location: Phoenix, AZ

    Synchronization: NTP V4 secondary (stratum 2) P-III/Linux 2.4

    Service Area: North America

    Access Policy: Open access. Please limit access to one or two hosts per site (large sites should set up their own ntp server)

    Contact: timekeeper@phxlib.org

  100. US AZ dewey.lib.ci.phoenix.az.us (148.167.132.200)

    Location: Phoenix, AZ

    Synchronization: NTP V4 secondary (stratum 2) P-III/Linux 2.4

    Service Area: North America

    Access Policy: Open access. Please limit access to one or two hosts per site (large sites should set up their own ntp server)

    Contact: timekeeper@phxlib.org

  101. US AZ ntp.drydog.com (207.211.160.111)

    Location: Tempe, AZ

    Synchronization: NTP V4 secondary (stratum 2) P-III/Linux 2.4

    Service Area: Western United States and Northern Mexico

    Access Policy: open access, please send a message to notify. Please limit access to one or two hosts per site (large sites should set up their own ntp server)

    Contact: Dan Anderson ( timekeeper@drydog.com)

  102. US CA clock.fmt.he.net (216.218.192.202)

    Location: Hurricane Electric, Fremont, California

    Synchronization: NTP V4 primary (GPS), Symmetricom NTS-150

    Service Area: all areas

    Access Policy: open access

    Contact: support@he.net

  103. US CA clock.sjc.he.net (216.218.254.202)

    Location: Hurricane Electric, San Jose, California

    Synchronization: NTP V4 primary (CDMA), Endrun Praecis CNTP

    Service Area: all areas

    Access Policy: open access

    Contact: support@he.net

  104. US CA ntp.ucsd.edu (132.239.254.49)

    Location: UCSD Academic Computing Services/Network Operations, San Diego, CA

    Synchronization: NTP secondary (stratum 2)

    Service Area: CERFNET; NSFNET, SDSC region and nearby

    Access Policy: open access, please send a message to notify.

    Contact: timekeeper@ucsd.edu

  105. US CA ntp1.mainecoon.com (63.192.96.2)

    Location: Quincy, California

    Geographic Coordinates: 39:56.863N, 120:54.657W

    Synchronization: NTP V4 secondary (stratum 2) P-II/X86 Solaris 2.7

    Service Area: North America

    Access Policy: Open Access, please drop us a note so we can add you to our mailing list.

    Contact:time@mainecoon.com or Chris Kennedy (chris@mainecoon.com)

    Note: ntp1 is a CNAME for time service. Please use DNS; IP assignments subject to change.

  106. US CA ntp2.mainecoon.com (63.192.96.3)

    Location: Quincy, California

    Geographic Coordinates: 39:56.863N, 120:54.657W

    Synchronization: NTP V4 secondary (stratum 2) Sun 4/75 Solaris 2.7

    Service Area: North America

    Access Policy: Open Access, please drop us a note so we can add you to our mailing list.

    Contact:time@mainecoon.com or Chris Kennedy (chris@mainecoon.com)

    Note: ntp2 is a CNAME for time service. Please use DNSUS

  107. CA ntp1.sf-bay.org (207.126.97.57)

    Location: San Jose, CA

    Synchronization: NTP secondary (stratum 2), FreeBSD

    Service Area: North America: Northern California and Pacific Northwest

    Access Policy: open access, please send a message to notify

    Contact: Scott Hazen Mueller (clockmaster@sf-bay.org)

  108. US CA ntp2.sf-bay.org (204.74.68.55)

    Location: Los Angeles, CA

    Synchronization: NTP secondary (stratum 2), FreeBSD

    Service Area: North America: Southern California

    Access Policy: open access, please send a message to notify

    Contact: Scott Hazen Mueller (clockmaster@sf-bay.org)

  109. US CA ntp.ucsd.edu (132.239.254.49)

    Location: UCSD Academic Computing Services/Network Operations, San Diego, CA

    Synchronization: NTP secondary (stratum 2)

    Service Area: CERFNET; NSFNET, SDSC region and nearby

    Access Policy: open access, please send a message to notify.

    Contact: timekeeper@ucsd.edu

  110. US CA reloj.kjsl.com (204.87.183.6)

    Location: Salinas, CA, USA

    Synchronization: NTP V3 secondary (stratum 2), MultiNet on VMS

    Service area: Western USA (Layer42 connectivity)

    Access policy: open access, please drop me a note if you use the server so I can keep you on the notify list.

    Contact: <timekeeper@kjsl.com>>

  111. US CA time.berkeley.netdot.net (216.27.190.202)

    Location: Berkeley, CA

    Synchronization: NTP secondary (stratum 2), FreeBSD

    Service Area: North America: Pacific Coast

    Access Policy: open access, please send a message to notify

    Contact: Caleb Haley (chaley@netdot.net)

    Note: time.berkeley.netdot.net is a CNAME

  112. US CA time.five-ten-sg.com (205.147.40.34)

    Location: Lake Arrowhead, CA, USA

    Synchronization: NTP V4 secondary (Stratum 2), Linux/intel

    Service Area: within 100ms of Digilink.net

    Access Policy: open access, email for firewall access first

    Contact: carl@five-ten-sg.com

  113. US CO ntp1.linuxmedialabs.com

    Location: Linux Media Labs LLC, Colorado Springs, CO

    Service Area: US

    Synchronization: NTP Secondary (stratum 2), i686/Linux

    Access Policy: open access

    Contact: ntp@linuxmedialabs.com

    Note: ntp1 is an alias and the IP address may change, please use DNS

  114. US CO ntp1.tummy.com

    Location: tummy.com, ltd., Fort Collins, CO

    Service Area: US

    Synchronization: NTP Secondary (stratum 2), i686/Linux

    Access Policy: open access.

    Contact: ntp@tummy.com

    Note: ntp1 is an alias and the IP address may change, please use DNS.

  115. US DE louie.udel.edu (128.4.40.12)

    Location: University of Delaware, Newark, DE

    Synchronization: NTP V3 secondary (stratum 2), Sun SPARC10/Solaris 2.6

    Service Area: CAIRN, Abilene/vBNS

    Access Policy: open access

    Contact: Dave Mills <mills@udel.edu>

  116. US GA ntp.shorty.com (208.21.108.186)

    Location: CNSG, Atlanta, GA

    Synchronization: NTP secondary (stratum 2), PC/Linux

    Service Area: Southeast United States

    Access Policy: Open access, please send an email to notify before use.

    Contact: timelords@shorty.com

    Note: Please use the CNAME ntp. IP addresses can (and likely will) change.

  117. US GA rolex.usg.edu

    Location: University System of Georgia NOC, Atlanta, GA

    Synchronization: NTP secondary (stratum 2)

    Service Area: PeachNet (Georgia)

    Access Policy: open access, please send a message with the hostname and/or address of your NTP client to notify.

    Contact: timekeeper@usg.edu

  118. US GA timex.usg.edu

    Location: University System of Georgia NOC, Atlanta, GA

    Synchronization: NTP secondary (stratum 2)

    Service Area: PeachNet (Georgia)

    Access Policy: open access, please send a message with the hostname and/or address of your NTP client to notify.

    Contact: timekeeper@usg.edu

  119. US IL ntp-0.cso.uiuc.edu (130.126.24.53)

    Location: University of Illinois, Urbana-Champaign, IL

    Synchronization: NTP secondary (stratum 2), Cisco-ASM/4

    Service Area: CICNET, Midwest, NCSA region

    Access Policy: open access

    Contact: Charley Kline (kline@uiuc.edu)

    Note: select one of (ntp-0.cso.uiuc.edu, ntp-1.cso.uiuc.edu, ntp-2.cso.uiuc.edu) to equalize load. Use names rather than IP addresses if possible. The ntp-N aliases follow wherever the service is moved to.

  120. US IL ntp-1.cso.uiuc.edu (130.126.24.24)

    Location: University of Illinois, Urbana-Champaign, IL

    Synchronization: NTP secondary (stratum 2), Cisco-ASM/4

    Service Area: CICNET, Midwest, NCSA region

    Access Policy: open access

    Contact: Charley Kline (kline@uiuc.edu)

    Note: select one of (ntp-0.cso.uiuc.edu, ntp-1.cso.uiuc.edu, ntp-2.cso.uiuc.edu) to equalize load. Use names rather than IP addresses if possible. The ntp-N aliases follow wherever the service is moved to.

  121. US IL ntp-1.mcs.anl.gov (140.221.9.20)

    Location: Argonne National Laboratory, near Chicago, IL

    Synchronization: NTP V3 secondary (stratum 2), Sun Sparcstation

    Service Area: NSF/ANSNet, CICNet, NetIllinois, ESNet, others welcome

    Policy: open access, please send a message to notify

    Contact: Systems Staff (ntp-contact@mcs.anl.gov)

    Note: IP addresses are subject to change; please use DNS

  122. US IL ntp-2.cso.uiuc.edu (130.126.24.44)

    Location: University of Illinois, Urbana-Champaign, IL

    Synchronization: NTP secondary (stratum 2), Cisco-ASM/4

    Service Area: CICNET, Midwest, NCSA region

    Access Policy: open access

    Contact: Charley Kline (kline@uiuc.edu)

    Note: select one of (ntp-0.cso.uiuc.edu, ntp-1.cso.uiuc.edu, ntp-2.cso.uiuc.edu) to equalize load. Use names rather than IP addresses if possible. The ntp-N aliases follow wherever the service is moved to.

  123. US IL ntp-2.mcs.anl.gov (140.221.9.6)

    Location: Argonne National Laboratory, near Chicago, IL

    Synchronization: NTP secondary (stratum 2), Sun Sparcstation 2

    Service Area: NSF/ANSNet, CICNet, NetIllinois, ESNet, others welcome

    Access Policy: open access, please send a message to notify

    Contact: Systems Staff (ntp-contact@mcs.anl.gov)

    Note: IP addresses are subject to change; please use DNS

  124. US IN gilbreth.ecn.purdue.edu (128.46.129.93, 128.46.141.93, 128.46.147.93, 128.46.148.93, 128.46.171.93)

    Location: Purdue University Engineering Computer Network, West Lafayette, IN

    Synchronization: NTP V3 secondary (stratum 2), Sun SPARCserver 1000/Solaris 2.3

    Service area: NSFNET, CICNET area

    Access policy: open access

    Contact: Mike Moya (moyman@ecn.purdue.edu)

  125. US IN harbor.ecn.purdue.edu (128.46.128.76, 128.46.129.76, 128.46.154.76)

    Location: Purdue University Engineering Computer Network, West Lafayette, IN

    Synchronization: NTP V3 secondary (stratum 2), Sun-4/75+/Solaris 2.3

    Service area: NSFNET, CICNET area

    Access policy: open access

    Contact: Mike Moya (moyman@ecn.purdue.edu)

  126. US IN horologe.cerias.purdue.edu(128.10.252.1)

    Location: CERIAS, Purdue University, West Lafayette, IN

    Synchronization: NTP V3/V4 stratum 2 server, Cisco router

    Geographic Coordinates: 40:25:33.2N, 86:54:54.7W (GPS)

    Service Area: Purdue University hosts only

    Access Policy: open access to Purdue University addresses. Please see our ntp WWW page.

    Contact: Gene Spafford ( ntp-request@cerias.purdue.edu)

    Note: This host does not support "daytime" — only UDP-based NTP.

  127. US IN molecule.ecn.purdue.edu (128.46.129.95, 128.46.132.95, 128.46.136.95, 128.46.145.95, 128.46.167.95, 128.46.169.95, 128.46.181.95)

    Location: Purdue University Engineering Computer Network, West Lafayette, IN

    Synchronization: NTP V3 secondary (stratum 2), Sun SPARCserver 1000/Solaris 2.3

    Service area: NSFNET, CICNET area

    Access policy: open access

    Contact: Mike Moya (moyman@ecn.purdue.edu)

  128. US IN tick.cerias.purdue.edu(128.10.252.9), tock.cerias.purdue.edu(128.10.252.10)

    Location: CERIAS, Purdue University, West Lafayette, IN

    Synchronization: NTP V3/V4 stratum 2 servers

    Geographic Coordinates: 40:25:33.2N, 86:54:54.7W (GPS)

    Service Area: Internet2, CIC and midwest US

    Access Policy: Open access but please see our ntp WWW page.

    Contact: Gene Spafford ( ntp-request@cerias.purdue.edu)

    Note: This host does not support "daytime" — only UDP-based NTP.

  129. US KS ntp1.kansas.net (199.240.130.1)

    Location: KansasNet OnLine Services, Manhattan, KS

    Synchronization: NTP V3 secondary (stratum 2), Linux on Intel

    Service area: Central USA / Great Plains

    Access policy: open access to ntp1.kansas.net *or* ntp2.kansas.net; customers may use both servers.

    Contact: support@kansas.net

  130. US KS ntp2.kansas.net (199.240.130.12)

    Location: KansasNet OnLine Services, Manhattan, KS

    Synchronization: NTP V3 secondary (stratum 2), Linux on Intel

    Service area: Central USA / Great Plains

    Access policy: open access to ntp1.kansas.net *or* ntp2.kansas.net; customers may use both servers.

    Contact: support@kansas.net

  131. US MA ntp.ourconcord.net (216.204.156.2)

    Location: Concord, MA

    Synchronization: NTP v4 stratum 2, Linux

    Service Area: Eastern time zone

    Access Policy: open access

    Contact: Bruce Walker (timekeeper@quidnet.com)

  132. US MN ns.nts.umn.edu (128.101.101.101)

    Location: Minneapolis, MN

    Synchronization: NTP secondary (stratum 2), Sun/SunOS 4.1.3

    Service Area: CICNET region

    Access Policy: open access, please send a message to notify.

    Networking & Telecommunications Services (nts@nts.umn.edu)

    Note: select one of ns.nts.umn.edu or nss.nts.umn.edu to equalize load

  133. US MN nss.nts.umn.edu (134.84.84.84)

    Location: St Paul, MN

    Synchronization: NTP secondary (stratum 2), Sun/SunOS 4.1.3

    Service Area: CICNET region

    Access Policy: open access, please send a message to notify.

    Networking & Telecommunications Services (nts@nts.umn.edu)

    Note: select one of ns.nts.umn.edu or nss.nts.umn.edu to equalize load

  134. US MO time-ext.missouri.edu (NO IP LISTED)

    Location: University of Missouri-Columbia, Columbia, MO, USA

    Synchronization: NTP secondary (stratum 2), Linux/Intel

    Service Area: MOREnet

    Access Policy: open access, please send a message to notify

    Contact: time@missouri.edu

  135. US MT chronos1.umt.edu (192.73.48.1)

    Location: University of Montana, Missoula, Montana

    Synchronization: NTP secondary (stratum 2), Cisco 7507

    Service Area: Northwest USA, Internet 2

    Access Policy: open access, please send message to notify

    Contact: Michael Bloom (michaelb@selway.umt.edu)

    Note: IP addresses are subject to change; please use DNS if possible

  136. US MT chronos2.umt.edu (192.73.48.2)

    Location: University of Montana, Missoula, Montana

    Synchronization: NTP secondary (stratum 2), Cisco 7507

    Service Area: Northwest USA, Internet 2

    Access Policy: open access, please send message to notify

    Contact: Michael Bloom (michaelb@selway.umt.edu)

    Note: IP addresses are subject to change; please use DNS if possible

  137. US MT chronos3.umt.edu (192.73.48.6)

    Location: University of Montana, Missoula, Montana

    Synchronization: NTP secondary (stratum 2), Cisco 7507

    Service Area: Northwest USA, Internet 2

    Access Policy: open access, please send message to notify

    Contact: Michael Bloom (michaelb@selway.umt.edu)

    Note: IP addresses are subject to change; please use DNS if possible

  138. US NC clock1.unc.edu (152.2.21.1)

    Location: University of North Carolina-Chapel Hill, Chapel Hill, NC

    Geographic Coordinates: 35:54N, 79:03W

    Synchronization: NTP secondary (stratum 2), Sun4/SunOS/xntpd (V3)

    Service Area: CONCERT region

    Access Policy: CONCERT region, others by prior arrangement

    Contact: Timekeeper (timekeeper@clock1.unc.edu) NOTE: The default restriction on this host is "noserve". Hosts outside the service area must make prior arrangements to receive time service.

  139. US NH ntp.uhfradio.com (64.35.195.62)

    Location: Contoocook, NH

    Synchronization: NTP V4 primary (GPS)Garmin16, Win2k/tac

    Service Area: Eastern time zone

    Access policy: Open access

    Contact: admin@uhfradio.com

    Note: IP addresses are subject to change; please use hostname. Important: Access policies subject to change if server is overloaded or abused. more info http://ntp.uhfradio.com

    Contact: admin (admin@uhfradio.com)

  140. US NJ tick.jrc.us (65.211.109.1)

    Location: Jensen Research Corporation, Oakland NJ

    Geographic Coordinates: 41 00.975 N, 74 15.262 W

    Synchronization: NTP V3 secondary (stratum 2), Cisco 3620 IOS 12.2

    Service Area: Eastern US

    Access Policy: Open access; please send a message to notify.

    Contact: JRC Network Ops (noc@jensenresearch.com) 201 337-4000

    Note: IP addresses are subject to change; please use DNS.

  141. US NJ tock.jrc.us (65.211.109.11)

    Location: Jensen Research Corporation, Oakland NJ

    Geographic Coordinates: 41 00.975 N, 74 15.262 W

    Synchronization: NTP V4 secondary (stratum 2), Intel PIII/866 Win2K

    Service Area: Eastern US

    Access Policy: Open access; please send a message to notify.

    Contact: JRC Network Ops (noc@jensenresearch.com) 201 337-4000

    Note: IP addresses are subject to change; please use DNS.

  142. US NV cuckoo.nevada.edu (131.216.1.101)

    Location: University of Nevada System Computing Services, Las Vegas,NV

    Synchronization: NTP V3 secondary (stratum 2), DEC Alpha/Unix

    Service Area: NevadaNet, NSFNET, SDSC region

    Access Policy: open access, please send message to notify

    Contact: Systems Group (software@nevada.edu)

    Note: cuckoo.nevada.edu is a CNAME for alphabits.nevada.edu

  143. US NV tick.cs.unlv.edu (131.216.22.15)

    Location: UNLV College of Engineering, Las Vegas, NV

    Synchronization: NTP V4 secondary (stratum 2), Solaris

    Service Area: Sprintnet

    Access Policy: open access, an email note is appreciated

    Contact: <grayaw@egr.unlv.edu>

    Note: select one of tick.cs.unlv.edu or tock.cs.unlv.edu at random to equalize load

  144. US NV tock.cs.unlv.edu (131.216.22.17)

    Location: UNLV College of Engineering, Las Vegas, NV

    Synchronization: NTP V4 secondary (stratum 2), Mips/Unix

    Service Area: Sprintnet

    Access Policy: open access, an email note is appreciated

    Contact: <grayaw@egr.unlv.edu>

    Note: select one of tick.cs.unlv.edu or tock.cs.unlv.edu at random to equalize load

  145. US NY clock.linuxshell.net (64.243.118.2)

    Location: LinuxShell Hosting, New York, NY, US.

    Synchronization: NTP V3 secondary (stratum 2), PC/Linux

    Service Area: Eastern US

    Access Policy: Open access.

    Contact: Chris Crowther (timekeeper@linuxshell.net)

    Note: clock.linuxshell.net is a CNAME, please use as DNS may change.

  146. US NY clock.nyc.he.net (209.51.161.238)

    Location: Hurricane Electric, New York City, New York

    Synchronization: NTP V4 primary (CMDA), Endrun Praecis CNTP

    Service Area: all areas

    Access Policy: open access

    Contact: support@he.net

  147. US NY ntp0.cornell.edu

    Location: Cornell University, Ithaca, NY

    Synchronization: NTP secondary (stratum 2), Sun/Unix

    Service Area: NYSERNet, NYSERNet 2000, Internet2/Abilene, vBNS

    Access Policy: open access

    Contact: Dan Eckstrom (de10@cornell.edu)

    Note: IP addresses are subject to change; please use DNS.

    Note: Open access for clients, though an email is appreciated (especially if peering).

  148. US NY reva.sixgirls.org (66.250.131.180)

    Location: The NYITC Building, 55 Broad Street, New York City, NY

    Geographic Coordinates: 40:42:20N, 74:0:40W

    Synchronization: NTP V4 secondary (stratum 2), m68k/NetBSD

    Service Area: New York, New Jersey, Connecticut, Long Island areas

    Access Policy: open access

    Contact: John Klos (john@sixgirls.org)

  149. US NY sundial.columbia.edu (128.59.59.177)

    Location: Morningside Campus, Columbia University, New York, NY

    Synchronization: NTP V3 secondary (stratum 2), Sun Sparc10 model 40

    Service Area: NYSERnet

    Access Policy: open access; please use name rather than address.

    Contact: timekeeper@columbia.edu

  150. US NY timex.cs.columbia.edu (128.59.16.20)

    Location: Columbia University Computer Science Department, New York City, NY

    Synchronization: NTP secondary (stratum 2), Sun/Unix

    Service Area: PSINET; NSFNET, NYSER region

    Access Policy: open access, authenticated NTP (DES/MD5) available

    Contact: James Tanis (timekeeper@cs.columbia.edu)

    Note: IP addresses are subject to change; please use DNS

  151. US PA clock-1.cs.cmu.edu (128.2.250.95)

    Location: Carnegie Mellon University Computer Science, Pittsburgh, PA

    Synchronization: NTP V3 secondary (stratum 2), Sun Sparc/Solaris 2.5.1

    Service Area: PSC region

    Access Policy: semi-open access; for use only by prior arrangement

    Contact: Help@cs.cmu.edu

    Note: The host name is an alias used only for time service.

  152. US PA clock-2.cs.cmu.edu (128.2.222.8)

    Location: Carnegie Mellon University Computer Science, Pittsburgh, PA

    Synchronization: NTP V3 secondary (stratum 2), Sun Sparc/SunOS 4.1.4

    Service Area: PSC region

    Access Policy: semi-open access; for use only by prior arrangement

    Contact: Help@cs.cmu.edu

    Note: The host name is an alias used only for time service.

  153. US PA clock.psu.edu (128.118.25.3)

    Location: Penn State University, University Park, PA

    Geographic Coordinates: 40:47:58.1N, 77:51:44.8W (USGS 40077-G7-TF-024)

    Synchronization: NTP V3 secondary (stratum 2), Sun/Unix

    Service Area: Internet2, vBNS, CERFnet(AT & T IP Services), PSC/NCNE, CASC.

    Access Policy: open access

    Contact: John Balogh <JDB@psu.edu>

    Note: clock.psu.edu is a CNAME for otc2.psu.edu

  154. US PA fuzz.psc.edu (128.182.58.100)

    Location: Pittsburgh Supercomputing Center, Pittsburgh, PA

    Synchronization: NTP V3 secondary (stratum 2), DEC5000/200

    Service area: NSFNET, PSC region

    Access policy: open access, but please send a message to notify.

    Contact: noc@psc.edu

  155. US PA ntp-1.cede.psu.edu (146.186.218.60)

    Location: Penn State University, University Park, PA

    Synchronization: NTP V4 secondary (stratum 2), IBM RS/6000-B50, Debian GNU Linux

    Service Area: Internet2, vBNS, CERFnet, PSC/NCNE

    Access Policy: open access, please send a message to notify

    Contact: timekeeper@cede.psu.edu

    Note: IP addresses are subject to change; please use DNS

  156. US PA ntp-2.cede.psu.edu (146.186.218.253)

    Location: Penn State University, University Park, PA

    Synchronization: NTP V4 secondary (stratum 2), i686, Debian GNU Linux

    Service Area: Internet2, vBNS, CERFnet, PSC/NCNE

    Access Policy: open access, please send a message to notify

    Contact: timekeeper@cede.psu.edu

    Note: IP addresses are subject to change; please use DNS

  157. US PA ntp-1.ece.cmu.edu (no address, please use DNS)

    Location: Carnegie Mellon Electrical and Computer Engineering, Pittsburgh, PA

    Geographic Coordinates: 40:26N, 79:57W

    Synchronization: NTP V3 secondary (stratum 2), Solaris 9

    Service Area: PREPNET, PSC region

    Access Policy: open access

    Contact: ECE Facilities (gripe@ece.cmu.edu)

    Note: Name is an alias for use by NTP.

  158. US PA ntp-2.ece.cmu.edu (no address, please use DNS)

    Location: Carnegie Mellon Electrical and Computer Engineering, Pittsburgh, PA

    Geographic Coordinates: 40:26N, 79:57W

    Synchronization: NTP V3 secondary (stratum 2), Solaris 9

    Service Area: PREPNET, PSC region

    Access Policy: open access

    Contact: ECE Facilities (gripe@ece.cmu.edu)

    Note: Name is an alias for use by NTP.

  159. US TX ntp.cox.smu.edu (129.119.80.126)

    Location: Cox School of Business, Southern Methodist University, Dallas, TX

    Synchronization: NTP V3 secondary (stratum 2), DEC 3000/300LX AXP DEC OSF/1 AXP

    Service Area: NSFNET, SESQUI region

    Access Policy: open access

    Contact: Allen Gwinn (allen@mail.cox.smu.edu)

    Note: Please send e-mail letting us know you will be using ntp.cox.smu.edu. ntp.cox.smu.edu is a CNAME for nyse.cox.smu.edu.

  160. US TX ntp.fnbhs.com (209.144.20.76)

    Location: First National Bank of Hughes Springs, TX

    Synchronization: NTP secondary (stratum 2), Debian Linux 2.1

    Service area: Northeast Texas

    Access policy: open access, please send a message to notify

    Contact: walterp@fnbhs.com

  161. US TX ntp.tmc.edu (128.249.1.10)

    Location: US TX ntp.tmc.edu (128.249.1.10)

    Location: Baylor College of Medicine, Houston, TX

    Synchronization: NTP secondary (stratum 2), Sun/Solaris

    Service Area: NSFNET, SESQUI region

    Access Policy: open access to other stratum 2 servers and upstream for statum 3 servers;not to be used for individual servers;please notify before use

    Contact: Postmaster (postmaster@tmc.edu)

  162. US TX ntppub.tamu.edu (no address available)

    Location: Texas A&M University, College Station, TX

    Synchronization: NTP secondary (stratum 2, ver. 3), SPARCstation 10/Solaris 1.x

    Service area: NSFNET, SESQUI region, THEnet, TAMUSDSN

    Access policy: open access

    Contact: NTP Administrator (ntp@tamu.edu)

  163. US TX tick.greyware.com (207.55.146.19)

    Location: Greyware Automation Products, Plano, TX

    Synchronization: NTP secondary (stratum 2), Windows NT

    Service Area: South-Central US, others by arrangement

    Access Policy: open access for any server with 50+ clients

    Contact: techsupport@greyware.com

    Note: IP may change, please use DNS name. Other protocols offered include TIME-UDP, TIME-TCP, and Domain Time II

  164. US TX tock.greyware.com (207.55.146.54)

    Location: Greyware Automation Products, Plano, TX

    Synchronization: NTP secondary (stratum 2), Windows NT

    Service Area: South-Central US, others by arrangement

    Access Policy: open access for any server with 50+ clients

    Contact: techsupport@greyware.com

    Note: IP may change, please use DNS name. Other protocols offered include TIME-UDP, TIME-TCP, and Domain Time II

  165. US VA ntp-1.vt.edu (198.82.1.201)

    Location: Virginia Tech, Blacksburg, Virginia, USA

    Synchronization: V3 Stratum 2 synced to local GPS primary servers

    Service Area: US southeastern region, Abilene

    Access Policy: open access

    Info: Communications Network Services

    Contact: ntp@cns.vt.edu

  166. US VA ntp-2.vt.edu (198.82.1.202)

    Location: Virginia Tech, Blacksburg, Virginia, USA

    Synchronization: V3 Stratum 2 synced to local GPS primary servers

    Service Area: US southeastern region, Abilene

    Access Policy: open access

    Info: Communications Network Services

    Contact: ntp@cns.vt.edu

  167. US VA ntp-3.vt.edu (198.82.1.203)

    Location: Virginia Tech, Blacksburg, Virginia, USA

    Synchronization: V3 Stratum 2 synced to local GPS primary servers

    Service Area: US southeastern region, Abilene

    Access Policy: open access

    Info: Communications Network Services

    Contact: ntp@cns.vt.edu

  168. US VA ntp-4.vt.edu (198.82.1.204)

    Location: Virginia Tech, Blacksburg, Virginia, USA

    Synchronization: V3 Stratum 2 synced to local GPS primary servers

    Service Area: US southeastern region, Abilene

    Access Policy: open access

    Info: Communications Network Services

    Contact: ntp@cns.vt.edu

  169. US VT ntp0.state.vt.us (159.105.23.194)

    Location: Vermont Agency of Administration, Montpelier

    Synchronization: NTP V3 secondary (stratum 2), IBM RS/6000 AIX 4.3.3

    Service Area: Vermont

    Access Policy: semi-open access; for use by any Govnet/K12net/VALS clients (159.105/16 & 170.222/16 prefixes)

    Contact: <info@govnet.state.vt.us>

    Note: The host name is an alias used only for time service.

  170. US VT ntp1.state.vt.us (159.105.23.130)

    Location: Vermont Agency of Administration, Montpelier

    Synchronization: NTP V3 secondary (stratum 2), IBM RS/6000 AIX 4.3.3

    Service Area: Vermont

    Access Policy: semi-open access; for use by any Govnet/K12net/VALS clients (159.105/16 & 170.222/16 prefixes)

    Contact: <info@govnet.state.vt.us>

    Note: The host name is an alias used only for time service.

  171. US VT ntp2.state.vt.us (170.222.64.130)

    Location: Vermont Agency of Administration, Montpelier

    Synchronization: NTP V3 secondary (stratum 2), IBM RS/6000 AIX 4.3.3

    Service Area: Vermont

    Access Policy: semi-open access; for use by any Govnet/K12net/VALS clients (159.105/16 & 170.222/16 prefixes)

    Contact: <info@govnet.state.vt.us>

    Note: The host name is an alias used only for time service.

  172. US WA [UltiMeth Systems]

    Location: Mill Creek (30km N of Seattle), Washington, USA

    Geographic Coordinates: 47:51:40.7N 122:11:23.5W

    Synchronization: NTP v4 stratum-2

    Service Area: Northwestern USA.

    Access Policy: Prior permission is now required, due to bozos.

    Contact: See our time server usage notes.

  173. US WI ntp1.cs.wisc.edu (128.105.39.11)

    Location: Computer Science Department, University of Wisconsin-Madison

    Geographic Coordinates: 89:24:30W, 43:08:00N

    Synchronization: NTP V4 secondary Solaris 2.7

    Service Area: US/any

    Access Policy: open access

    Contact: David Thompson ( ntp-admin@cs.wisc.edu)

    Note: IP addresses are subject to change; please use DNS

  174. US WI ntp3.cs.wisc.edu (128.105.37.11)

    Location: Computer Science Department, University of Wisconsin-Madison

    Geographic Coordinates: 89:24:30W, 43:08:00N

    Synchronization: NTP V4 secondary Solaris 2.7

    Service Area: US/any

    Access Policy: open access

    Contact: David Thompson ( ntp-admin@cs.wisc.edu)

    Note: IP addresses are subject to change; please use DNS

  175. US WI ntp3.sf-bay.org (207.126.97.57)

    Location: Milwaukee, WI

    Synchronization: NTP secondary (stratum 2), FreeBSD

    Service Area: North America: Central Time Zone

    Access Policy: open access, please send a message to notify

    Contact: Scott Hazen Mueller (clockmaster@sf-bay.org)

  176. VE ntp.linux.org.ve (150.188.8.196)

    Localizaci: VELUG, Grupo de Usuarios Linux de Venezuela

    Sincronizaci: NTP secundario (stratum 2), Pentium/Linux

    Area de Servicio: Arica

    Potica de Acceso: Abierta, por favor enviar e-mail para notificar

    Contacto: time@linux.org.ve

  177. ZA ntp.cs.unp.ac.za (143.128.82.200)

    Location: Natal University, Pietermaritzburg, South Africa

    Synchronization: NTP V3 secondary (stratum 2), SGI Indy/Irix6.2

    Service area: South Africa

    Access policy: open access, please send a message to notify

    Contact: sysadmin@cs.unp.ac.za

  178. ZA tock.nml.csir.co.za (146.64.241.229)

    Location: Pretoria, South Africa

    Geographic Coordinates: 25,7461 S 28,2770 E (WGS-84)

    Service Area: Southern Africa

    Synchronization: NTP secondary (stratum 2), i386/FreeBSD

    Access Policy: open access

    Contact: elmarais@csir.co.za

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