Public NTP Primary (stratum 1) Time Servers Compiled by David L. Mills (mills@udel.edu) The last update: Wed Aug 23 02:35:11 1995 PST8PD apple.com (130.43.2.2) Location: Apple Computer, Cupertino, CA Synchronization: NTP primary (WWV clock), VAX/Unix Service Area: NSFNET, BARR region, CSNET Access Policy: open access Contact: Erik Fair (timekeeper@apple.com) bitsy.mit.edu (18.72.0.3) Location: MIT Information Systems, Cambridge, MA Geographic Coordinates: 42:21:36N, 71:05:24W Synchronization: NTP primary (WWV clock), VAX/Unix Service Area: NSFNET, NEARnet area Access Policy: open access Contact: Jeff Schiller (jis@mit.edu) canon.inria.fr (192.93.2.20) Location: INRIA, Rocquencourt (near Paris), France Synchronization: NTP V3 primary (TDF clock), Sun/Unix Service Area: RENATER, France Access Policy: open access, please send a message to notify Contact: ntp-adm@inria.fr Note: We use a Datel RCH208 clock with SER024 V24 interface. chantry.hawaii.net (128.171.1.1, 132.160.1.4) Location: University of Hawaii, Honolulu, HI Synchronization: NTP primary (WWV/H clock), Sun/Unix Service Area: PACCOM region Contact: Kevin Mayeshiro (kevin@hawaii.edu) chronos.univ-rennes1.fr (129.20.128.2) Location: University of Rennes, Britany, France Synchronization: NTP V3 primary (GPS clock), Sun/Unix Service Area: France/Europe Access Policy: open access, send a message to notify Contact: timemaster@univ-rennes1.fr Note: the reference time is given by a Trimble SVeeSix receiver with PPS signal clock.isc.org (192.5.5.250) Location: Internet Software Consortium, Palo Alto, CA Geographic Coordinates: 122 9 41 W / 37 26 35 N Synchronization: NTP primary (GOES clock), BSD UNIX Service Area: BARRnet, Alternet-west, CIX-west Access Policy: open access Contact: Paul Vixie clock.llnl.gov (128.115.14.97) Location: Lawrence Livermore National Laboratory, Livermore, CA Synchronization: NTP V3 primary (WWVB clock), Sun 3/60 Service Area: BARRNet, ESNet Access Policy: open access Contact: Joe Carlson (carlson@lll-winken.llnl.gov) clock.nc.fukuoka-u.ac.jp (133.100.9.2) Location: Fukuoka university, Fukuoka, Japan Geographic Coodinates: 130:21.81E, 33:32.87N Synchronization: NTP V3.3 primary (GPS clock), Heliostation 400/SunOS 4.1.3 Service Area: Japan/Pacific area Access Policy: open access Contact: TSURUOKA Tomoaki (tsuruoka@fukuoka-u.ac.jp), YOSHIMURA Kenji (yosimura@tl.fukuoka-u.ac.jp) Note: We use a TRAK 8810 GPS STATION CLOCK and a Furuno Electric Co.'s GN-72 GPS receiver respectively. clock.tl.fukuoka-u.ac.jp (133.100.11.8) Location: Fukuoka university, Fukuoka, Japan Geographic Coodinates: 130:21.81E, 33:32.87N Synchronization: NTP V3.3 primary (GPS clock), Heliostation 400/SunOS 4.1.3 Service Area: Japan/Pacific area Access Policy: open access Contact: TSURUOKA Tomoaki (tsuruoka@fukuoka-u.ac.jp), YOSHIMURA Kenji (yosimura@tl.fukuoka-u.ac.jp) Note: We use a TRAK 8810 GPS STATION CLOCK and a Furuno Electric Co.'s GN-72 GPS receiver respectively. clock.osf.org (130.105.1.156) Location: Open Software Foundation, Boston, MA Synchronization: NTP primary (WWV clock), PMAX/Unix Service Area: NSFNET, NEARnet region Access Policy: open access Contact: Paul Groff (groff@osf.com) Note: prior permission to access required fuzzy.nta.no (128.39.1.149) Location: The Research Department of the Norwegian Telecommunications Administration (NTA-RD), Kjeller, Norway Synchronization: NTP primary, (NTP clock), Fuzzball (LORAN-C timebase) Service Area: Norway Access Policy: closed access; for use only by prior arrangement Contact: Terje Hammer (ham@tor.nta.no) lerc-dns.lerc.nasa.gov (128.156.1.43) Location: NASA Lewis Research Center, Cleveland, OH Synchronization: NTP Primary (WWVB clock), Sun/Unix Service Area: NSFNET, OARNET Access Policy: open access Contact: Joe Rossoll (yyjer@scivax.lerc.nasa.gov) mizbeaver.udel.edu (128.4.1.2) Location: University of Delaware, Newark, DE Geographic Coordinates: 39:40:48.425N, 75:45:02.392W (GPS WGS84) Synchronization: NTP V3 primary (GPS clock), Tymeserve 2000 LAN Time Server, SNTP (RFC-1361) service Service Area: NSFNET, SURA region Access Policy: experimental access only; service may be withdrawn without notice Contact: Dave Mills (mills@udel.edu) Note: This server does not implement the NTP control-message protocol ncar.ucar.edu (192.52.106.6, 192.43.244.9) Location: NCAR Supercomputer Center, Boulder, CO Synchronization: NTP V3 primary (WWVB clock), Sun 4/690 Service Area: NSFNET, WESTnet region Access Policy: open access, please limit to two peer hosts per site Contact: Greg Woods (woods@ucar.edu) ncnoc.concert.net (192.101.21.1) Location: CONCERT Network NOC, Research Triangle Park, NC Synchronization: NTP V3 primary (WWVB clock), Netclock/2, Sun 4/65 Service Area: CONCERT region Access Policy: CONCERT region, other use by prior arrangement Contact: Tim Seaver (tas@concert.net) norad.arc.nasa.gov (192.203.230.10) Location: NASA Ames Research Center, Moffett Field, CA Synchronization: NTP primary (WWVB clock), Sun/Unix Service Area: NSFNET, BARR region, NASA NSN, DOE ESNET, DDN Access Policy: open access Bohdan Cmaylo (clockmaster@nsipo.nasa.gov) ntp.ml.csiro.au (192.67.12.101) Location: CSIRO Marine Laboratories, Hobart, Tasmania, Australia Geographic Coordinates: 42:53:14S, 147:20:18E Synchronization: NTP V3 primary (Kinemetrics OM-DC Omega clock), SGI/Unix Service Area: AARNet Access Policy: open access, but please send a message to notify. Contact: Steve Clift (clift@ml.csiro.au) Note: ntp is an alias and the IP address may change; please use DNS. Caveat: The path to here may exhibit significant delay asymmetry. ntp.syd.dms.csiro.au (swifty.dap.csiro.au) 130.155.98.13 Location: National Measurements Laboratory, Sydney Australia. Geographic Coordinates: 33:46:58S 151:09:06E Synchronization: NTP V3, HP 5061B Cesium Beam Frequency Standard via Leitch CSD-5300 Master Clock System Driver Service Area: AARNet Access Policy: open access Contact: Mark Andrews (clockmaster@syd.dms.csiro.au) ntp0.ja.net (128.232.0.8) Location: University of Cambridge Computer Laboratory, UK Geographic Coordinates: 52:12:00N, 00:09:00E Synchronization: NTP V3 primary (MSF EES clock), Sun/Unix Service Area: JIPS, UK, Europe Access Policy: closed access, email address below. Contact: jips-nosc@nic.ja.net Note: This server is part of the centrally managed JIPS (approximately ac.uk) NTP network. Any requests for connections (internal or external to JIPS) should be emailed to the Contact address above. ntp0.nl.net (193.78.240.12) Location: NLnet, Amsterdam, The Netherlands Synchronization: NTP primary (DCF77), Sun/Unix SunOS 4.1.3 Service Area: The Netherlands/Europe Access Policy: open access Contact: beheer@nl.net ntp1.sony.com (198.93.3.1) Location: Sony San Jose, San Jose, CA Geographic Coordinates: 37:24:9.7N 121:55:55.8W (GPS) Synchronization: NTP V3 primary (GPS clock), PC/BSDI 1.1 Service Area: NSFnet, BARRnet region Access Policy: open access, please contact first Contact: Jerry Scharf (scharf@sony.com), Paul Vixie (vixie@vix.com) ntps1-0.uni-erlangen.de (131.188.1.40) Location: University Erlangen-Nuernberg, D-91058 Erlangen, FRG Geographic Coordinates: 49.573N 11.028E (from Meinberg GPS 166) Synchronization: NTP V3 primary (GPS receiver (<<1us)), Sun SS2/Unix SunOS 4.1.3 Service Area: Germany/Europe Access Policy: open access, pick one of ntps1-{0,1,2}.uni- erlangen.de Contact: Frank Kardel, Rainer Pruy (time@informatik.uni-erlangen.de) ntps1-0.cs.tu-berlin.de (130.149.18.50) Location: Technische Universitaet Berlin, D-10587 Berlin, FRG Geographic Coordinates: 52.518N 13.326E Synchronization: NTP V3 primary (Meinberg GPS 166), Sun 4/65 SunOS4.1.3 Service Area: Germany/Europe Access Policy: open access Contact: Gerard Gschwind (gg@cs.tu-berlin.de) ntps1-1.cs.tu-berlin.de (130.149.17.8) Location: Technische Universitaet Berlin, D-10587 Berlin, FRG Geographic Coordinates: 52.518N 13.326E Synchronization: NTP V3 primary (Meinberg GPS 166), SunS10-402 SunOS5.4 Service Area: Germany/Europe Access Policy: open access Contact: Gerard Gschwind (gg@cs.tu-berlin.de) ntps1-1.rz.Uni-Osnabrueck.DE (131.173.17.11) Location: University of Osnabrueck, D-W4500 Osnabrueck, FRG Synchronization: NTP V3 primary (DCF77 clock), Sun/Unix Service Area: Germany/Europe Access Policy: open access Contact: Gerald Timmer (gtimmer@rz.Uni-Osnabrueck.DE) ntps1-1.uni-erlangen.de (131.188.1.45) Location: University Erlangen-Nuernberg, D-91058 Erlangen, FRG Geographic Coordinates: 49.573N 11.028E (from Meinberg GPS 166) Synchronization: NTP V3 primary (DCF77 PZF receiver (<50us)), Sun 4/690/SunOS 4.1.3 Service Area: Germany/Europe Access Policy: open access, pick one of ntps1-{0,1,2}.uni- erlangen.de Contact: Frank Kardel, Rainer Pruy (time@informatik.uni-erlangen.de) ntps1-2.uni-erlangen.de (131.188.1.31) Location: University Erlangen-Nuernberg, D-91058 Erlangen, FRG Geographic Coordinates: 49.573N 11.028E (from Meinberg GPS 166) Synchronization: NTP V3 primary (DCF77 PZF receiver (<50us)), Sun 4/490/SunOS 4.1.3 Service Area: Germany/Europe Access Policy: open access, pick one of ntps1-{0,1,2}.uni- erlangen.de Contact: Frank Kardel, Rainer Pruy (time@informatik.uni-erlangen.de) otc1.psu.edu (128.118.46.3) Location: Penn State University, University Park, PA Synchronization: NTP V3 primary (WWV clock), Sun/Unix Service Area: NSFNET, PREPNET, JvNCnet Access Policy: open access Contact: John Balogh (JohnBalogh@psu.edu) (no longer: jdb@ecl.psu.edu) pi.bellcore.com (128.96.60.5) Location: Bell Communications Research, Morristown NJ Synchronization: NTP primary (WWVB clock), DECstation/Ultrix Service Area: JvNCnet Access Policy: open access Contact: Dan Strick (timekeeper@bellcore.com) Note: Timekeeper announces intention to withdraw service. rackety.udel.edu (128.4.1.1) Location: University of Delaware, Newark, DE Geographic Coordinates: 39:40:48.425N, 75:45:02.392W (GPS WGS84) Synchronization: NTP V3 primary (GPS clock), Sun IPC/SunOS 4.1.1 Service Area: NSFNET, SURA region Access Policy: closed access, except for stratum-2 servers providing synchronization to local networks of ten or more hosts Contact: Dave Mills (mills@udel.edu) * ntp.cc.utexas.edu (129.116.3.50) Location: University of Texas at Austin, Austin TX Synchronization: NTP V3 primary (WWV clock), Sun Sparc1+/SunOS 4.1.3_U1 Service Area: THENET region Access Policy: open access Contact: William L. Jones (jones@hpcf.cc.utexas.edu) swisstime.ethz.ch (129.132.2.21) Location: Integrated Systems Laboratory, Swiss Fed. Inst. of Technology, CH 8092 Zurich, Switzerland Geographic Coordinates: 47:23N, 8:32E Synchronization: NTP primary (DCF77 clock), Sun-4/490/SunOS 4.1.3 Service Area: Switzerland/Europe Access Policy: open access, Please send e-mail message to notify that you are using us for time service, so that we can alert you about any interruptions of service, etc. Contact: Adam Feigin (time@swisstime.ethz.ch) Note: The host name is an alias used only for time service.

  • tick.usask.ca (128.233.3.100) Location: University of Saskatchewan, Saskatoon, SK, Canada Geographic Coordinates: 52:08:01N, 106:38:11W Synchronization: NTP V3 Primary (GOES clock), VAX/Unix Service Area: SASK#net, CA*net, Canada Access Policy: open access, prior arrangment required Contact: Glenn Hollinger (glenn@herald.usask.ca) Note: priority to local regional sites Note: tick.usask.ca and tock.usask.ca share a single GOES receiver tick.usno.navy.mil (192.5.41.40) Location: U.S. Naval Observatory, Washington, DC Geographic Coordinates: 38:55:14.01 77:03:58.03 (GPS WGS84) Synchronization: NTP V3 primary (USNO Master Clock 2, H-maser), HP9000/747i Service Area: NSFNET Access Policy: open access Contact: Rich Schmidt (res@tuttle.usno.navy.mil) time-A.timefreq.bldrdoc.gov (132.163.135.130) Location: National Institute of Standards and Technology, Boulder, Colorado Geographic Coordinates: 39:59:43.9N, 254:44:15.9E, +1649.9m (WGS 84) Synchronization: Direct 1 pps from Cesium Ensemble, DECstation/ULTRIX Service Area: NSFnet, WESTnet Access Policy: open to stratum-2 servers and others by arrangement Contact: Judah Levine (jlevine@time.nist.gov), (303) 492-7785 time.nist.gov (192.43.244.18) Location: National Center for Atmospheric Research, Boulder, Colorado Geographic Coordinates: 39:58:43.44N 254:43:32.5E +1840m (WGS 84) Synchronization: ACTS dial-up with NTP backup, DECstation/ULTRIX Service Area: NSFnet, WESTnet Access Policy: open to stratum-2 servers and others by arrangement Contact: Judah levine (jlevine@time.nist.gov), (303) 492-7785 Time1.Stupi.SE (192.36.143.150) Location: Stupi AB, Stockholm, SWEDEN Synchronization: NTP V3 primary (Saphir Cesium Beam Standard/GPS), BSDI Unix Service Area: SUnet, NORDUnet Access Policy: open access Contact: Peter Lothberg (roll@Stupi.SE) time.service.uit.no Location: The EDB Centre, University of Tromsoe, Norway Synchronization: NTP V3 primary (GPS clock), HP-UX/Unix Service Area: NORDUnet Access Policy: semi-open access, prior arrangment required Contact: (timekeeper@uit.no) timer.unik.no (128.39.10.149) Location: UNIK (University Department at Kjeller), Kjeller, Norway Synchronization: NTP V3 primary, (NTP clock), Fuzzball (cecium timebase) Service Area: Norway Access Policy: open access Contact: Paal Spilling (paal@tor.nta.no) Note: This host presently not responding. tock.usask.ca (128.233.3.101) Location: University of Saskatchewan, Saskatoon, SK, Canada Geographic Coordinates: 52:08:01N, 106:38:11W Synchronization: NTP V3 Primary (GOES clock), VAX/Unix Service Area: SASK#net, CA*net, Canada Access Policy: open access, prior arrangment required Contact: Glenn Hollinger (glenn@herald.usask.ca) Note: priority to local regional sites Note: tick.usask.ca and tock.usask.ca share a single GOES receiver tock.usno.navy.mil (192.5.41.41) Location: U.S. Naval Observatory, Washington, DC Geographic Coordinates: 38:55:14.01 77:03:58.03 (GPS WGS84) Synchronization: NTP V3 primary (USNO Master Clock 2, H-maser), HP9000/747i Service Area: NSFNET Access Policy: open access Contact: Rich Schmidt (res@tuttle.usno.navy.mil) truechimer.cso.uiuc.edu (128.174.5.49) Location: University of Illinois, Champaign, IL Synchronization: NTP V3 primary (WWVB clock), IBM-RS6000/250 Service Area: CICNET, NSFNET, NCSA region Access Policy: closed access except for peers that meet the three conditions outlined in the "Time Servers" section of this file. State agreement with those conditions in notification message. All others may use the ntp-{0,1,2}.cso.uiuc.edu stratum 2 servers. Contact: Paul Pomes (p-pomes@uiuc.edu) Note: truechimer is a DNS CNAME. The host with the WWVB clock will always have the truechimer alias. umd1.umd.edu (128.8.10.1) Location: University of Maryland, College Park, MD Synchronization: NTP V3 primary (WWVB clock), Fuzzball Service Area: NSFNET, SURA region Access Policy: closed access, except for stratum-2 servers providing synchronization to local networks of ten or more hosts Contact: Michael Petry (petry@ni.umd.edu) vecrhc1.hpl.hp.com (15.255.60.3) Location: Hewlett-Packard Laboratorites, Bristol, UK Synchronization: NTP primary (MSF clock), HP/Unix Service Area: HP corporate Access Policy: closed access; for use only by prior arrangement Contact: Robert Cole (rhc@hplb.hp.com) wave.mbari.org (134.89.2.100) Location: Monterey Bay Aquarium Research Institute, Pacific Grove, CA Synchronization: NTP primary (WWV clock), HP/Unix Service Area: NSFNET, BARR region Access Policy: closed access; for use only by prior arrangement Contact: Pat Allen (timekeeper@mbari.org) wwvb.col.hp.com (15.255.240.16) Location: Hewlett Packard Co., Colorado Springs, CO Synchronization: NTP V3 primary (WWVB clock), HP-UX Service Area: NSFNET, BARR region Access Policy: semi-open access, prior arrangment required Contact: Bdale Garbee (bdale@col.hp.com) wwvb.erg.sri.com (128.18.{4,100,110}.39) Location: SRI International, Menlo Park, CA Synchronization: NTP primary (WWVB clock) Sun/Unix Service Area: NSFNET, BARRnet Region Access Policy: open access Contact: clockmaster@erg.sri.com Note: wwvb.erg.sri.com is a CNAME for (presently) sparkyfs.erg.sri.com. clockmaster@erg.sri.com is currently aliased to John Ferguson (ferg@erg.sri.com) and Bryan McDonald (bigmac@erg.sri.com). Last update: 5/25/94. wwvb.isi.edu (128.9.2.129) Location: USC Information Sciences Institute, Marina del Rey, CA Geographic Coordinates: 33:58:49N, 118:26:20W (USGS map NAD27) Synchronization: NTP V3 primary (WWVB clock), Fuzzball Service Area: NSFNET, Los Nettos region Access Policy: open access Contact: Steve Casner (casner@isi.edu) wwvb.sdd.hp.com (15.255.160.64) Location: Hewlett Packard Co., San Diego, CA Synchronization: NTP V3 primary (WWVB clock), HP-UX/Unix Service Area: NSFNET, BARR region Access Policy: semi-open access, prior arrangment required Contact: Ken Stone (timekeeper@sdd.hp.com) Note: Used for code development sake.library.ucla.edu (128.123.111.102) Location: Los Angeles Synchronization: UCLA Service Area: UCLA and other UC Systems Access Policy: open Contact: Eric Wu (ewu@library.ucla.edu) Note: Testing Clock1 form time.usc.edu (123.111.133.234) Location: Los Angeles Synchronization: USC Service Area: Whole world Access Policy: Open Access Contact: Tammy T. (tammy@usc.edu) Note: Go USC! REALLY? time.ntp.org (101.101.102.123) Location: USA Synchronization: WWW Service Area: USA Access Policy: open Contact: Time Keeper (timekeeper@time.ntp.org) Note: test 3 u8404.bs.ptb.de (141.25.84.4) Location: National Institute for Physics Technology, Germany Synchronization: Cesium Timebase, DCF77 Mainflingen, Sun/Unix Service Area: Germany Access Policy: semi-open access, prior arrangment required Contact: postmaster@ptb.de Note: The Physikalisch-Technische Bundesanstalt (PTB) has been entrusted by the Time Act of 1978 to realize and distribute the legal time for the Federal Republic of Germany