Public NTP Secondary (stratum 2) Time Servers

Last update: 20 September 1999 UTC

  1. augean.eleceng.adelaide.edu.au (129.127.28.4)

    2. Location: University of Adelaide, South Australia
    Synchronization: NTP secondary (stratum 2), Sun-4/75/Unix
    Service area: AARNet
    Access policy: open access, please send a message to notify
    Contact: systems at eleceng.adelaide.edu.au
  2. bernina.ethz.ch (129.132.98.11)

    3. Location: Swiss Fed. Inst. of Technology, CH 8092 Zurich, Switzerland
    Geographic Coordinates: 47:23N, 8:32E
    Synchronization: NTP secondary (stratum 2), Sun SS10-51/SunOS4
    Service Area: Switzerland/Europe
    Access Policy: open access
    Contact: Adam Feigin (time at iis.ee.ethz.ch)
  3. biofiz.mf.uni-lj.si (193.2.69.11)

    4. Location: Institute of Biophysics, University of Ljubljana, Slovenia
    Geographic Coordinates: 46:03:09N, 14:30:40E
    Synchronization: NTP V3 secondary (stratum 2), HP/Unix
    Service Area: Slovenia/Europe
    Access Policy: open access, please send a message to notify
    Contact: Primoz Peterlin (time at biofiz.mf.uni-lj.si)
  4. black-ice.cc.vt.edu (128.173.14.71)

    5. Location: Virginia Tech Computing Center, Blacksburg, VA, USA
    Synchronization: NTP V3 secondary (Stratum 2), RS/6000-220
    Service Area: southeastern US, anyplace netwise close to ANSNet Greensboro
    Access Policy: open access
    Contact: valdis at black-ice.cc.vt.edu or Valdis.Kletnieks at vt.edu
    Note: ntp-2.vt.edu is a CNAME for black-ice.cc.vt.edu
  5. bug.fe.up.pt (193.136.54.1)

    6. 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 at bug.fe.up.pt for more information.
  6. chime.utoronto.ca (128.100.102.201)

    7. 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 at madhaus.cns.utoronto.ca)
    Note: IP addresses are subject to change; please use DNS
  7. chime1.surfnet.nl (192.87.106.101) deleted
  8. churchy.udel.edu (128.4.1.5) deleted
  9. clock.psu.edu (128.118.25.3)

    10. 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: JDB at psu.edu (John Balogh) <JDB at psu.edu>
    Note: clock.psu.edu is a CNAME for otc2.psu.edu
  10. clock.netcetera.dk (130.228.230.2)

    11. Location: Copenhagen, Denmark, Europe
    Synchronization: NTP secondary (stratum 2), i386/Linux
    Service area: Denmark, Scandinavia, Northern Europe
    Access policy: open access, please send a message to notify
    Contact: ask at netcetera.dk
    Note: clock is an alias and the IP address may change; please use DNS
  11. clock2.netcetera.dk (194.192.207.9)

    12. Location: Copenhagen, Denmark, Europe
    Synchronization: NTP secondary (stratum 2), i386/Linux
    Service area: Denmark, Scandinavia, Northern Europe
    Access policy: open access, please send a message to notify
    Contact: ask at netcetera.dk
    Note: clock2 is an alias and the IP address may change; please use DNS
  12. clock.tricity.wsu.edu (192.31.216.30)

    13. Location: Washington State University Tri-Cities, Richland, Wa
    Synchronization: NTP secondary (stratum 2), DS5000/Ultrix
    Service Area: NSFNET, NorthWestNet
    Access Policy: open access
    Contact: postmaster at beta.tricity.wsu.edu)
    Note: clock.tricity.wsu.edu is a CNAME for dragon.tricity.wsu.edu
  13. clock1.unc.edu (152.2.21.1)

    14. 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 at 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.
  14. clock-1.cs.cmu.edu (128.2.250.95)

    15. Location: Carnegie Mellon University Computer Science, Pittsburgh, PA
    Geographic Coordinates: 40:26:39N, 79:57:12W
    Synchronization: NTP V3 secondary (stratum 2), DECstation 5000- 120/Ultrix 4.2A
    Service Area: PREPNET, PSC region
    Access Policy: semi-open access; for use only by prior arrangement
    Contact: Rudy Nedved (ern+ at cs.cmu.edu)
    Note: The host name is an alias used only for time service.
  15. clock-2.cs.cmu.edu (128.2.222.8)

    16. Location: Carnegie Mellon University Computer Science, Pittsburgh, PA
    Geographic Coordinates: 40:26:39N, 79:57:12W
    Synchronization: NTP V3 secondary (stratum 2), DECstation 5000- 120/Ultrix 4.2A
    Service Area: PREPNET, PSC region
    Access Policy: semi-open access; for use only by prior arrangement
    Contact: Rudy Nedved (ern+ at cs.cmu.edu)
    Note: The host name is an alias used only for time service.
  16. constellation.ecn.uoknor.edu (129.15.22.8)

    17. Location: University of Oklahoma, Norman, Oklahoma, USA
    Synchronization: NTP secondary (stratum 2), Mac Quadra 700/A/UX 3.0
    Service Area: Midnet
    Access Policy: open access
    Contact: Robert Shull (rob at mailhost.ecn.uoknor.edu)
  17. cuckoo.nevada.edu (131.216.1.101)

    18. 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 at nevada.edu)
    Note: cuckoo.nevada.edu is a CNAME for alphabits.nevada.edu
  18. delphi.cs.ucla.edu (131.179.128.36) deleted
  19. dominator.eecs.harvard.edu (140.247.60.28)

    20. Location: Harvard University, Cambridge, MA USA
    Synchronization: NTP V3 secondary (Stratum 2), DEC Alpha OSF/1 V3.2
    Service Area: Eastern US
    Access Policy: open access
    Contact: rtm at eecs.harvard.edu
  20. eagle.tamu.edu (165.91.72.27) deleted
  21. everest.cclabs.missouri.edu (128.206.206.12)

    22. Location: University of Missouri-Columbia, Columbia, MO, USA
    Synchronization: NTP secondary (stratum 2), SGI Indigo R4000/IRIX 5.3
    Service Area: MOREnet
    Access Policy: open access, please send a message to notify
    Contact: Paul Walmsley (ccshag at cclabs.missouri.edu) or timemaster at cclabs.missouri.edu
  22. fartein.ifi.uio.no (129.240.64.3)

    23. 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: Jens Thomassen (timekeeper at ifi.uio.no)
  23. fuzz.psc.edu (128.182.58.100)

    24. 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 at psc.edu
  24. fuzz.sura.net (192.80.214.42)

    25. Location: SURAnet, College Park, MD
    Synchronization: NTP V3 secondary (stratum 2), Fuzzball
    Service Area: NSFNET, SURAnet region
    Access Policy: closed access; please use ntp1.sura.net or ntp2.sura.net
    Contact: timekeeper at sura.net
    Note: formerly known as clock.umd.edu (192.41.177.92); fuzz.sura.net has a CNAME of clock.sura.net
  25. gazette.bcm.tmc.edu (128.249.2.2) deleted
  26. gilbreth.ecn.purdue.edu (128.46.129.93, 128.46.141.93, 128.46.147.93, 128.46.148.93, 128.46.171.93)

    27. 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 at ecn.purdue.edu)
  27. harbor.ecn.purdue.edu (128.46.128.76, 128.46.129.76, 128.46.154.76)

    28. 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 at ecn.purdue.edu)
  28. info.cyf-kr.edu.pl: 149.156.4.11

    29. 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 at cyf-kr.edu.pl
  29. hmljhp.rzs-hm.si (193.2.208.12)

    30. Location: Hydrometeorological Institute of Slovenia, Ljubljana, Slovenia
    Geographic Coordinates: 46:03:09N, 14:30:40E
    Synchronization: NTP V3 secondary (stratum 2), HP/Unix
    Service Area: SLovenia/Europe
    Access Policy: open access, please send a message to notify
    Contact: Metod Kozelj (metod.kozelj at rzs-hm.si)
  30. lassen.slc.ca.gov (134.186.121.10) deleted
  31. 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)

    32. 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 at ecn.purdue.edu)
  32. finch.cc.ukans.edu (129.237.32.1) deleted
  33. kuhub.cc.ukans.edu (129.237.32.2) deleted
  34. libra.rice.edu (128.42.1.64)

    35. Location: Rice University, Houston, TX
    Synchronization: NTP secondary (stratum 2), Fuzzball
    Service Area: NSFNET, SESQUI region
    Access Policy: open access
    Contact: Farrell Gerbode (gerbode at rice.edu)
    Note: this server has not been heard from for many months [dlm]
  35. louie.udel.edu (128.175.1.3)

    36. Location: University of Delaware, Newark, DE
    Synchronization: NTP V3 secondary (stratum 2), Sun SPARC10/Solaris 2.6
    Service Area: NSFNET, SURA region
    Access Policy: open access
    Contact: mills at udel.edu (Dave Mills)
  36. ns.scruz.net (165.227.1.1)

    37. Location: scruz-net, inc. Santa Cruz, CA USA
    Synchronization: NTP V3 secondary (stratum 2), BSD on Intel
    Service area: Western USA (MAE-West attached)
    Access policy: open access (scruz-net customers use both ns.scruz.net and nic.scruz.net, others please use one or the other, not both... please drop us a note if you're using the server so we can keep you on our status list)
    Contact: Matthew Kaufman (matthew at scruz.net)
  37. ns.nts.umn.edu (128.101.101.101)

    38. 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 at nts.umn.edu)
    Note: select one of ns.nts.umn.edu or nss.nts.umn.edu to equalize load
  38. nss.nts.umn.edu (134.84.84.84)

    39. 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 at nts.umn.edu)
    Note: select one of ns.nts.umn.edu or nss.nts.umn.edu to equalize load
  39. ntp.adelaide.edu.au (129.127.40.3)

    40. Location: University of Adelaide, South Australia
    Synchronization: NTP V3 secondary (stratum 2), DECsystem 5000/25 Unix
    Service Area: AARNet
    Access Policy: open access
    Contact: Danielle Hopkins (dani at itd.adelaide.edu.au)
  40. ntp.cox.smu.edu (129.119.80.126)

    41. 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 at 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.
  41. ntp.cs.strath.ac.uk (130.159.196.123, 130.159.196.125)

    42. Location: Dept. Computer Science, Strathclyde University, Glasgow, Scotland.
    Geographic Coordinates: 04:14W, 55:52N
    Synchronization: NTP V3 secondary Sun/Unix
    Service Area: UK/Europe/any
    Access Policy: open access
    Contact: Ian Gordon (ntp at cs.strath.ac.uk)
    Note: IP addresses are subject to change; please use DNS
  42. ntp.cs.unp.ac.za (143.128.82.200)

    43. 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 at cs.unp.ac.za
  43. ntp.cs.unp.ac.za (143.128.82.200)

    44. 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 at cs.unp.ac.za
  44. ntp.css.gov (140.162.1.3)

    45. Location: Center for Seismic Studies, Arlington, VA
    Geographic Coordinates: 38:53:50N, 77:04:34W
    Synchronization: NTP V3 secondary (stratum 2), Sun-Sparc-5, Solaris 5.5.1
    Service Area: NSFNET, SURA region
    Access Policy: open access
    Contact: timekeeper (timekeeper at cmr.gov)
  45. ntp.ctr.columbia.edu (128.59.64.60)

    46. Location: Columbia University Center for Telecommunications Research; New York City, NY
    Synchronization: NTP secondary (stratum 2), Sun/Unix
    Service Area: Sprintlink/NYSERnet
    Access Policy: open access, authenticated NTP (DES/MD5) available
    Contact: Seth Robertson (timekeeper at ctr.columbia.edu)
    Note: IP addresses are subject to change; please use DNS
  46. ntp-cup.external.hp.com (192.6.38.127)

    47. Location: Cupertino CA (SF Bay area) 37:20N/122:00W
    Synchronization: NTPv3 secondary (stratum 2), HP-UX
    Service Area: West Coast USA
    Access Policy: open access
    Contact: dalton at cup.hp.com
    Note: no need to notify for access, go right ahead!
  47. ntp.exnet.com (194.207.34.9)

    48. 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 at exnet.com or dhd at exnet.com
    Note: Please see our Web page before using. Please use CNAME ntp.exnet.com since IP address may well change.
  48. ntp.fnbhs.com (209.144.20.76)

    49. 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 at fnbhs.com
  49. ntp.lth.se (130.235.20.3)

    50. 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 at lth.se
  50. ntp.maths.tcd.ie

    51. Location: School of Mathematics, Trinity College, Dublin, Ireland.
    Synchronization: NTPV3 secondary (stratum 2), Intel, FreeBSD 2.2
    Service Area: Ireland, UK
    Access Policy: open access, please send a message to notify.
    Contact: time at 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. ntp.olivetti.com (129.189.134.11, 129.189.134.6) shutdown
  52. ntp.linux.org.ve (150.185.192.250)

    53. 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 at linux.org.ve
  53. ntp.saard.net (203.21.37.18)

    54. 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: Danielle Hopkins (dani at itd.adelaide.edu.au)
  54. NTP.shorty.com (208.21.108.186)

    55. 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 at shorty.com
    Note: Please use the CNAME ntp. IP addresses can (and likely will) change.
  55. ntp.tmc.edu (128.249.1.10)

    56. Location: Baylor College of Medicine, Houston, Tx
    Synchronization: NTP secondary (stratum 2), Sun/Solaris
    Service Area: NSFNET, SESQUI region
    Access Policy: open access
    Contact: Postmaster (postmaster at tmc.edu)
  56. ntp.ucsd.edu (132.239.254.49)

    57. 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 at ucsd.edu
  57. ntp.ultimeth.net (209.20.237.215) deleted; see time.ultimeth.net
  58. time.ultimeth.net (use DNS)

    59. Location: Mill Creek, Washington, USA
    Synchronization: NTP secondary (stratum 2), i486/Linux
    Service Area: Northwest USA
    Access Policy: Open access after reading our NTP usage notes.
    Contact: timekeeper at ultimeth.net
  59. ntp.univ-lyon1.fr (134.214.100.6)

    60. 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 at 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.
  60. ntp0.cornell.edu (192.35.82.50)

    61. Location: Cornell University, Ithaca, NY
    Synchronization: NTP secondary (stratum 2), Sun/Unix
    Service Area: NSFNET, NYSER region
    Access Policy: open access
    Contact: Donald Redick (dredick at nmc.cit.cornell.edu)
  61. ntp0.pipex.net 158.43.128.33

    62. Configuration: NTP V3 secondary (stratum 2), Sun sparc Ultra, Solaris 2.5.1, xntpd 3-5.90
    Location: Cambridge, UK
    Service Area: UUNET UK (formerly known as PIPEX); UK
    Access Policy: Semi-open access. These are primarily for use by UUNET UK customers, but others are welcome to peer if they give notice.
    Contact: timelord at uunet.pipex.com
    Note: This is not currently a supported service of UUNET UK, and is not subject to any guarantees. UUNET UK customers should peer with all three: ntp0.pipex.net, ntp1.pipex.net, and ntp2.pipex.net. Other users please peer with one of these three only.
  62. ntp1.cmc.ec.gc.ca

    63. Location: Canadian Meteorological Centre, Dorval, Québec, Canada
    Synchronization: NTP V4 secondary SGI/Unix
    Service Area: Eastern Canada
    Access Policy: open access
    Contact: (ntp-admin at cmc.ec.gc.ca)
  63. ntp1.mainecoon.com (63.192.96.2)

    64. 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 at mainecoon.com or Chris Kennedy (chris at mainecoon.com)
    Note: ntp1 is a CNAME for time service. Please use DNS; IP assignments subject to change.
  64. ntp2.cmc.ec.gc.ca

    65. Location: Canadian Meteorological Centre, Dorval, Québec, Canada
    Synchronization: NTP V4 secondary SGI/Unix
    Service Area: Eastern Canada
    Access Policy: open access
    Contact: (ntp-admin at cmc.ec.gc.ca)
  65. ntp2.mainecoon.com (63.192.96.3)

    66. 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 at mainecoon.com or Chris Kennedy (chris at mainecoon.com)
    Note: ntp2 is a CNAME for time service. Please use DNS; IP
  66. ntp1.kansas.net (199.240.130.1)

    67. 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 at kansas.net
  67. ntp2.kansas.net (199.240.130.12)

    68. 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 at kansas.net
  68. ntp1.pipex.net 158.43.128.66

    69. Configuration: NTP V3 secondary (stratum 2), Sun sparc Ultra, Solaris 2.5.1, xntpd 3-5.90
    Location: Cambridge, UK
    Service Area: UUNET UK (formerly known as PIPEX); UK
    Access Policy: Semi-open access. These are primarily for use by UUNET UK customers, but others are welcome to peer if they give notice.
    Contact: timelord at uunet.pipex.com
    Note: This is not currently a supported service of UUNET UK, and is not subject to any guarantees. UUNET UK customers should peer with all three: ntp0.pipex.net, ntp1.pipex.net, and ntp2.pipex.net. Other users please peer with one of these three only.
  69. ntp2.pipex.net 158.43.192.66

    70. Configuration: NTP V3 secondary (stratum 2), Sun sparc Ultra, Solaris 2.5.1, xntpd 3-5.90
    Location: London, UK
    Service Area: UUNET UK (formerly known as PIPEX); UK
    Access Policy: Semi-open access. These are primarily for use by UUNET UK customers, but others are welcome to peer if they give notice.
    Contact: timelord at uunet.pipex.com
    Note: This is not currently a supported service of UUNET UK, and is not subject to any guarantees. UUNET UK customers should peer with all three: ntp0.pipex.net, ntp1.pipex.net, and ntp2.pipex.net. Other users please peer with one of these three only.
  70. ntp1.sura.net (128.167.1.222)

    71. Location: SURAnet, College Park, MD
    Synchronization: NTP V3 secondary (stratum 2), Sun Sparc/SunOS
    Service Area: SURAnet region
    Access Policy: open access; please send a message to notify.
    Contact: timekeeper at sura.net
  71. ntp2.sura.net (128.167.254.198)

    72. Location: SURAnet, College Park, MD
    Synchronization: NTP V3 secondary (stratum 2), DEC DECstation/Ultrix
    Service Area: SURAnet region
    Access Policy: open access; please send a message to notify.
    Contact: timekeeper at sura.net
  72. ntp1.cs.wisc.edu (128.105.1.16)

    73. Location: Computer Science Department, University of Wisconsin-Madison
    Geographic Coordinates: 89:24:30W, 43:08:00N
    Synchronization: NTP V3 secondary Alpha/OSF 3.2
    Service Area: US/any
    Access Policy: open access
    Contact: David Thompson (ntp-admin at cs.wisc.edu)
    Note: IP addresses are subject to change; please use DNS
  73. ntp2.cs.wisc.edu (128.105.1.17)

    74. Location: Computer Science Department, University of Wisconsin-Madison
    Geographic Coordinates: 89:24:30W, 43:08:00N
    Synchronization: NTP V3 secondary Alpha/OSF 3.2
    Service Area: US/any
    Access Policy: open access
    Contact: David Thompson (ntp-admin at cs.wisc.edu)
    Note: IP addresses are subject to change; please use DNS
  74. ntp3.cs.wisc.edu (128.105.1.18)

    75. Location: Computer Science Department, University of Wisconsin-Madison
    Geographic Coordinates: 89:24:30W, 43:08:00N
    Synchronization: NTP V3 secondary Alpha/OSF 3.2
    Service Area: US/any
    Access Policy: open access
    Contact: David Thompson (ntp-admin at cs.wisc.edu)
    Note: IP addresses are subject to change; please use DNS
  75. ntp5.tamu.edu (165.91.52.110)

    76. 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 at tamu.edu)
  76. ntp-1.ece.cmu.edu 128.2.236.71

    77. Location: Carnegie Mellon Electrical and Computer Engineering, Pittsburgh, PA
    Geographic Coordinates: 40:26N, 79:57W
    Synchronization: NTP V3 secondary (stratum 2), IBM 40P/AIX 4.1.5
    Service Area: PREPNET, PSC region
    Access Policy: open access, please notify
    Contact: ECE Facilities (gripe at ece.cmu.edu)
    Note: Name is an alias for use by NTP.
  77. ntp-2.ece.cmu.edu 128.2.25.7

    78. Location: Carnegie Mellon Electrical and Computer Engineering, Pittsburgh, PA
    Geographic Coordinates: 40:26N, 79:57W
    Synchronization: NTP V3 secondary (stratum 2), IBM 40P/AIX 4.1.5
    Service Area: PREPNET, PSC region
    Access Policy: open access, please notify
    Contact: ECE Facilities (gripe@ece.cmu.edu)
    Note: Name is an alias for use by NTP.
  78. ntp-1.mcs.anl.gov (140.221.9.20)

    79. 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 at mcs.anl.gov)
    Note: IP addresses are subject to change; please use DNS
  79. ntp-2.mcs.anl.gov (140.221.9.6)

    80. 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: Support Staff (support at mcs.anl.gov)
    Note: IP addresses are subject to change; please use DNS
  80. ntp1.ossi.com (192.240.4.1) deleted
  81. ntp2.ossi.com (192.240.4.50) deleted
  82. ntp-0.cso.uiuc.edu (130.126.24.53)

    83. 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 at 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.
  83. ntp-1.cso.uiuc.edu (130.126.24.24)

    84. 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 at 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.
  84. ntp-2.cso.uiuc.edu (130.126.24.44)

    85. 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 at 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.
  85. ntp2a.audiotel.com.mx (200.34.146.67)

    86. 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 at audiotel.com.mx)
  86. ntp2b.audiotel.com.mx (200.34.146.68)

    87. 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 at audiotel.com.mx)
  87. ntp2c.audiotel.com.mx (200.34.146.69)

    88. 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 at audiotel.com.mx)
  88. ntp2a.mcc.ac.uk (130.88.200.22)

    89. Location: University of Manchester, Manchester, England
    Synchronization: Sun
    Service Area: UK
    Access Policy: Open Access
    Contact(s): timelords at mcc.ac.uk
  89. ntp2b.mcc.ac.uk 130.88.200.6)

    90. Location: University of Manchester, Manchester, England
    Synchronization: Sun
    Service Area: UK
    Access Policy: Open Access
    Contact(s): timelords at mcc.ac.uk
  90. ntp2c.mcc.ac.uk 130.88.200.4)

    91. Location: University of Manchester, Manchester, England
    Synchronization: Sun
    Service Area: UK
    Access Policy: Open Access
    Contact(s): timelords at mcc.ac.uk
  91. ntp2d.mcc.ac.uk 130.88.203.12)

    92. Location: University of Manchester, Manchester, England
    Synchronization: HP 9000/750
    Service Area: UK
    Access Policy: Open Access
    Contact(s): timelords at mcc.ac.uk
  92. ntps.net4u.it (195.32.52.129)

    93. Location: 4u Srl, Vercelli, Italy
    Synchronization: NTP secondary (stratum 2), Linux 2 on Intel PII 300MHz
    Service area: Italy
    Access policy: open access, please send a message to notify
    Contact: timemaster at net4u.it
  93. Rolex.PeachNet.EDU (198.72.72.10)

    94. Location: PeachNet NOC, Kennesaw, GA
    Synchronization: NTP secondary (stratum 2), Sun Sparc/Unix
    Service Area: PeachNet (Georgia), Southeast U.S.A. Netwise close to UUNET and BBN
    Access Policy: open access, please send a message with the hostname and/or address of your NTP client to notify.
    Contact: timekeeper at peachnet.edu
    Note: For single NTP clients, we prefer you poll Timex.PeachNet.EDU. For NTP servers which support large NTP domains please use Rolex.PeachNet.EDU. Please use the CNAME as IP addresses may change.
  94. sign.chg.ru (193.233.46.10)

    95. 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 at chg.ru) or time at sign.chg.ru
  95. slug.ctv.es [194.179.52.14] (will add an alias for this purpose)

    96. 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 at slug.ctv.es)
  96. salmon.maths.tcd.ie (134.226.81.11)

    97. Location: Trinity College, Dublin, Ireland
    Synchronization: NTP secondary (stratum 2), MIPS Magnum
    Service Area: Ireland, UK
    Access Policy: open access
    Contact: time at maths.tcd.ie
    Note: salmon.maths.tcd.ie (134.226.81.11), ashe.cs.tcd.ie (134.226.32.17) and lib1.tcd.ie (134.226.1.24)peer together over local area net, and one or more usually run at stratum 2. It is normally sufficient just to pick one machine to peer with.
  97. smart1.svi.org (192.216.191.10) decommisioned
  98. sundial.columbia.edu (128.59.35.142)

    99. 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
    Contact: timekeeper at columbia.edu
  99. tick.anice.net.ar (209.14.116.1)

    100. Location: AD Communications, Buenos Aires, Argentina
    Synchronization: NTP V3 secondary (stratum 2), Cisco IGS 11.1
    Service Area: Argentina
    Access Policy: open access, please send a message to notify
    Contact: Pablo J. Fritz (timekeeper at anice.net.ar)
    Note: tick.anice.net.ar is a CNAME for cisco.ad.net.ar
  100. tick.cs.unlv.edu (131.216.16.9)

    101. Location: UNLV College of Engineering, Las Vegas, NV
    Synchronization: NTP V3 secondary (stratum 2), Mips/Unix
    Service Area: Sprintnet
    Access Policy: open access
    Contact: Greg Wohletz <greg at cs.unlv.edu>
    Note: select one of tick.cs.unlv.edu or tock.cs.unlv.edu at random to equalize load
  101. tick.koalas.com (207.48.109.6)

    102. Location: Koala Computers, Coos Bay, OR
    Geographic Coordinates: 43.36N 124.19W
    Synchronization: NTP V3 Secondary (Stratum 2), PC/Linux
    Service Area: Northwestern U.S.
    Access Policy: open access
    Contact: (webmaster at koalas.com)
  102. tick.utoronto.ca (128.100.103.252)

    103. 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 at madhaus.cns.utoronto.ca)
    Note: IP addresses are subject to change; please use DNS
  103. ticktock.wang.com (150.124.136.4) deleted
  104. time.aba.net.au (203.21.84.4)

    105. Location: Australian Business Access, Carlton, Victoria, Australia
    Synchronization: NTP secondary (stratum 2), PC/OpenBSD
    Service area: Telstra Internet, and the rest of Australia
    Access policy: open access
    Contact: timemaster at aba.net.au
  105. time.five-ten-sg.com (205.147.40.50)

    106. 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 at five-ten-sg.com
  106. time.ijs.si (193.2.4.6)

    107. 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 at ijs.si)
    Note: IP address subject to change; better use DNS
  107. time.nrc.ca (132.246.168.148)

    108. 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 at nrc.ca
    Note: time is an alias and the IP address may change; please use DNS.
  108. time.sinectis.com.ar (200.16.183.2)

    109. Location: Sinectis S.A., Buenos Aires (Argentina)
    Geographic Coordinates: 3432'S, 5820'W
    Service Area: Argentina
    Synchronization: NTP secondary (stratum 2)
    Access Policy: open access, please send a message to notify.
    Contact: Pablo Cingolani, Levan Djaparidze (timekeeper at sinectis.com.ar)
    Note: time is an alias and the IP address may change; please use DNS.
  109. time.software.net deleted
  110. timelord.uregina.ca (142.3.100.15)

    111. 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 at uregina.ca
    Note: please limit to one or two hosts per site.
  111. timeserver.cs.umb.edu (158.121.104.4)

    112. Location: UMass-Boston CS dept, Boston, MA
    Synchronization: NTP V3 secondary (stratum 2), DEC/Ultrix
    Service Area: Service Area: New England
    Access Policy: Open. Please notify 
    Primary Contact: Rick Martin (rickm at cs.umb.edu)
    Secondary Contact: Leonard David (ldavid at cs.umb.edu)
  112. timex.cs.columbia.edu (128.59.16.20)

    113. 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 at cs.columbia.edu)
    Note: IP addresses are subject to change; please use DNS
  113. Timex.PeachNet.EDU (131.144.4.21)

    114. Location: PeachNet NOC, Kennesaw, GA
    Synchronization: NTP secondary (stratum 2), Sun Sparc/Unix
    Service Area: PeachNet (Georgia), Southeast U.S.A. Netwise close to UUNET and BBN
    Access Policy: open access, please send a message with the hostname and/or address of your NTP client to notify.
    Contact: timekeeper at peachnet.edu
    Note: For single NTP clients, we prefer you poll Timex.PeachNet.EDU. For NTP servers which support large NTP domains please use Rolex.PeachNet.EDU. Please use the CNAME as IP addresses may change.
  114. tmc.edu (128.249.1.1) deleted
  115. tock.anice.net.ar (209.14.117.1)

    116. Location: Anice NET, Buenos Aires, Argentina
    Synchronization: NTP V3 secondary (stratum 2), Cisco IGS 11.2
    Service Area: Argentina
    Access Policy: open access, please send a message to notify
    Contact: Pablo J. Fritz (timekeeper at anice.net.ar)
    Note: tock.anice.net.ar is a CNAME for router.anice.net.ar
  116. tock.cs.unlv.edu (131.216.18.4)

    117. Location: UNLV College of Engineering, Las Vegas, NV
    Synchronization: NTP V3 secondary (stratum 2), Mips/Unix
    Service Area: Sprintnet
    Access Policy: open access
    Contact: Greg Wohletz <greg at cs.unlv.edu>
    Note: select one of tick.cs.unlv.edu or tock.cs.unlv.edu at random to equalize load
  117. tock.utoronto.ca (128.100.100.128)

    118. 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 at madhaus.cns.utoronto.ca)
    Note: IP addresses are subject to change; please use DNS
  118. truechimer[123].waikato.ac.nz (130.217.76.16, 130.217.66.91, 130.217.96.20)

    119. Location: The University of Waikato. Hamilton, New Zealand
    Synchronisation: NTP V3 (stratum 2), Digital AlphaServer 800 and AXP 3000's/Digital UNIX
    Service Area: New Zealand
    Access Policy: open access within New Zealand
    Contact: ntp at waikato.ac.nz
  119. vtserf.cc.vt.edu (128.173.4.6)

    120. Location: Virginia Tech Computing Center, Blacksburg, VA, USA
    Synchronization: NTP V 3 secondary (Stratum 2), DEC 5810/ultrix
    Service Area: southeastern US, anyplace netwise close to ANSNet Greensboro
    Access Policy: open access
    Contact: valdis at black-ice.cc.vt.edu or Valdis.Kletnieks at vt.edu
    Note: ntp-1.vt.edu is a CNAME for vtserf.cc.vt.edu
  120. wuarchive.wustl.edu (128.252.135.4)

    121. Location: Washington University, St. Louis, Missouri, USA
    Synchronization: NTP secondary (stratum 2), DECstation 5000/Ultrix
    Service Area: Midnet
    Access Policy: open access
    Contact: Chris Myers (chris at wupost.wustl.edu)
  121. www1.cmc.ec.gc.ca deleted
  122. www2.cmc.ec.gc.ca deleted
  123. xfiles.esa.lanl.gov (128.165.196.1) deleted
  124. xfiles-jr.esa.lanl.gov (128.165.196.2) deleted