NTP users are strongly urged to take immediate action to ensure that their NTP daemon is not susceptible to use in a reflected denial-of-service (DRDoS) attack. Please see the NTP Security Notice for vulnerability and mitigation details, and the Network Time Foundation Blog for more information. (January 2014)
Stratum One Time Servers
Please read the Rules Of Engagement before using these lists. These lists are updated frequently and should not be cached.
Click the ISO Country Code to view complete details about a server. See InactiveTimeServers for previously listed servers that are no longer in service.
| ISO: | Location: | Host / Sponsor: | Service Area: | Access Policy: | Notify? | LastModified: |
|---|---|---|---|---|---|---|
| AM | AMNIC DC, Yerevan, Armenia | worldwide | OpenAccess | No | 2011-11-17T18:31:24Z | |
| AM | AMNIC DC, Yerevan, Armenia | worldwide | OpenAccess | No | 2013-04-01T21:48:39Z | |
| AM | Yerevan,Armenia | Europe,Armenia | OpenAccess | No | 2013-02-20T16:26:58Z | |
| AR | Buenos Aires, Argentina | Xfree.com.ar | Argentina | OpenAccess | Yes | 2013-03-02T07:26:30Z |
| AT | Vienna | aco.net, VIX customers, Austrian Internet users | OpenAccess | No | 2009-07-17T11:01:08Z | |
| AT | Wiener Neustadt, Austria | Austria/Europe | OpenAccess | Yes | 2010-11-05T14:29:35Z | |
| AT | Hallein | jh1.at | OpenAccess | No | 2013-02-18T20:26:23Z | |
| AT | InterXion, 1210 Vienna | aco.net, VIX customers, Austrian Internet users | OpenAccess | No | 2013-02-20T16:27:37Z | |
| AU | Brisbane | Australia | ClosedAccess | Yes | 2012-09-27T03:21:36Z | |
| AU | Melbourne | Australia | ClosedAccess | Yes | 2013-04-11T22:44:12Z | |
| AU | Sydney | Australia | ClosedAccess | Yes | 2012-09-27T03:22:38Z | |
| AU | Katherine, Australia | Worldwide | OpenAccess | No | 2013-06-12T02:34:24Z | |
| AU | Perth | Australia | ClosedAccess | Yes | 2012-09-27T03:20:41Z | |
| BE | Royal Observatory of Belgium | all areas | OpenAccess | No | 2006-03-16T11:06:27Z | |
| BE | Royal Observatory of Belgium | all areas | OpenAccess | No | 2006-03-16T11:08:00Z | |
| BG | Sofia, Bulgaria | OpenAccess | No | 2012-09-26T17:21:27Z | ||
| BR | São Paulo, Brazil | Brazil | OpenAccess | No | 2013-02-18T20:08:57Z | |
| BR | Brazil | Brazil | OpenAccess | No | 2013-02-18T20:48:40Z | |
| BR | Rio de Janeiro, Brazil | Brazil | OpenAccess | No | 2013-02-18T20:49:18Z | |
| BR | Brazilian Research Network/Rede Nacional de Pesquisa (RNP) | Brazil | RestrictedAccess | No | 2004-09-25T02:33:58Z | |
| BR | Laboratory for the Processing of Analog and Digital Signals (PADS), Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil | Brazil, Latin America and Caribbean | OpenAccess | No | 2012-07-22T03:32:50Z | |
| BR | Rio de Janeiro, Brazil | Brazil | OpenAccess | No | 2013-02-18T20:48:58Z | |
| BR | Brasília, Brasil | Brazil | OpenAccess | No | 2011-03-11T18:29:38Z | |
| BY | Belarus | OpenAccess | Yes | 2011-09-06T13:56:55Z | ||
| CA | University oc Saskatchewan, Saskatoon, Saskatchewan, SK, Canada | SASK#net, CA*net, Canada | OpenAccess | Yes | 2004-09-25T02:49:00Z | |
| CA | Vancouver, British Columbia, Canada | Western Canada, northwest USA | RestrictedAccess | Yes | 2007-02-14T13:48:03Z | |
| CA | University of Regina, Regina, Saskatchewan, Canada | SASK#net, CA*net, Canada | RestrictedAccess | Yes | 2004-09-25T02:40:20Z | |
| CA | Department of Computer Science, University of Calgary, Calgary, Alberta, Canada | North America | RestrictedAccess | Yes | 2004-12-10T19:38:38Z | |
| CA | University of Saskatchewan, Saskatoon, Saskatchewan, SK, Canada | SASK#net, CA*net, Canada | OpenAccess | Yes | 2004-09-25T02:47:00Z | |
| CA | Oakville, Ontario, Canada | Servman.ca | Eastern Canada and US | OpenAccess | Yes | 2013-07-02T16:48:13Z |
| CH | St. Moritz | OpenAccess | Yes | 2009-04-02T14:05:22Z | ||
| CH | Zug, Switzerland | Europe | OpenAccess | Yes | 2012-06-18T16:07:02Z | |
| CH | Bülach/Zürich | Freestone Systems | Europe | OpenAccess | Yes | 2013-12-26T20:34:04Z |
| CH | Zug, Switzerland | Europe | OpenAccess | Yes | 2012-06-18T16:02:43Z | |
| CL | Servicio Hidrografico y Oceanografico de la Armada de Chile | Chile | OpenAccess | Yes | 2004-09-25T02:54:33Z | |
| CL | Dpto. Geofísica, Universidad de Chile. Santiago, Chile. | REUNA and interconnected networks, Chile | OpenAccess | Yes | 2004-09-25T02:53:20Z | |
| CN | TIAN_LAB,Beijing,China | www.openxid.com | China Internet Users | OpenAccess | Yes | 2013-08-04T00:24:53Z |
| CN | Qingdao, China | teramoby inc. | Asia, China, anywhere | OpenAccess | Yes | 2014-01-01T15:37:42Z |
| CN | Northeastern University, Shenyang, Liaoning, China | NEU | China | OpenAccess | Yes | 2013-08-08T02:08:59Z |
| CN | Nanjing,Jiangsu,China | China Internet Users | OpenAccess | No | 2011-03-15T11:55:47Z | |
| CZ | [[http://www.cesnet.cz/english][CESNET]Prague, The Czech Republic | Czech Republic and Slovakia, European academic community | RestrictedAccess | Yes | 2004-09-25T02:56:29Z | |
| CZ | CZ.NIC, z.s.p.o., Americka 23, Prague | Czech Republic | OpenAccess | Yes | 2013-02-18T20:27:23Z | |
| CZ | UFE Prague, The Czech Republic | OpenAccess | Yes | 2013-01-18T16:18:48Z | ||
| DE | one4vision Gmbh, Saarbruecken, Saarland, Germany | Germany, Europe | OpenAccess | Yes | 2004-01-06T13:10:00Z | |
| DE | UHR.DE, Berlin, Germany | Germany | OpenAccess | Yes | 2008-05-09T05:05:28Z | |
| DE | Technische Universitaet Berlin, D-10587 Berlin, FRG | Germany/Europe | OpenAccess | No | 2009-01-30T08:47:17Z | |
| DE | Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany | Germany/Europe, others by arrangement | OpenAccess | Yes | 2007-01-11T18:31:27Z | |
| DE | University Erlangen-Nuernberg, D-91058 Erlangen, FRG | Germany/Europe | OpenAccess | No | 2004-12-14T15:01:17Z | |
| DE | Neuss, Germany | Paul Florian Hoberg, hoberg.cc | EU/DE/CH/AT/FR, PL, RU | OpenAccess | Yes | 2014-01-10T17:41:30Z |
| DE | Freie Universität Berlin, Zentraleinrichtung für Datenverarbeitung (ZEDAT), Germany | Germany/Europe | OpenAccess | No | 2013-06-12T19:28:15Z | |
| DE | Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany | Germany/Europe, others by arrangement | OpenAccess | Yes | 2007-01-11T18:32:55Z | |
| DE | University Erlangen-Nuernberg, D-91058 Erlangen, FRG | Germany/Europe | OpenAccess | No | 2004-12-14T15:01:38Z | |
| DE | Computer Center University of Stuttgart, D-70550 Stuttgart, Germany | Germany/Europe | OpenAccess | Yes | 2004-09-25T14:20:32Z | |
| DE | Mainz, Germany | Networks BGP-announced on the rlp-Netz and the X-WiN | RestrictedAccess | No | 2012-11-30T09:15:29Z | |
| DE | Technische Universitaet Berlin, D-10587 Berlin, FRG | Germany/Europe | OpenAccess | No | 2012-08-06T15:14:53Z | |
| DE | University Erlangen-Nuernberg, D-91058 Erlangen, FRG | Germany/Europe | OpenAccess | No | 2004-12-14T15:00:25Z | |
| DE | Passau | OpenAccess | Yes | 2006-09-07T10:44:12Z | ||
| DE | University Erlangen-Nuernberg, D-91058 Erlangen, FRG | Germany/Europe | OpenAccess | No | 2004-12-14T15:00:50Z | |
| DE | Frankfurt, Germany | Worldwide | OpenAccess | No | 2005-10-27T19:52:20Z | |
| DE | Freie Universität Berlin, Zentraleinrichtung für Datenverarbeitung (ZEDAT), Germany | Germany/Europe | OpenAccess | No | 2013-06-12T19:30:14Z | |
| DK | Varde, Denmark | Denmark | RestrictedAccess | Yes | 2013-12-06T23:05:37Z | |
| DK | Lyngby, Denmark | Networks BGP-announced on the DIX | RestrictedAccess | No | 2004-09-25T14:25:19Z | |
| DK | Sonnerup, Denmark | Denmark/Europe | RestrictedAccess | Yes | 2011-02-26T19:03:44Z | |
| DK | Copenhagen N, Denmark (IPv6 access via Amsterdam) | Europe | OpenAccess | Yes | 2012-10-16T12:48:46Z | |
| DK | Copenhagen N, Denmark | Europe | OpenAccess | Yes | 2012-10-16T12:48:21Z | |
| DK | Slagelse, Denmark | As network paths make it sensible | RestrictedAccess | Yes | 2004-09-25T14:22:57Z | |
| EE | Tallinn, Estonia | worldwide | OpenAccess | Yes | 2013-07-26T21:14:26Z | |
| EE | Tallinn, Estonia | worldwide | OpenAccess | Yes | 2013-07-26T21:14:42Z | |
| ES | ROA, San Fernando, Cadiz, España | OpenAccess | Yes | 2005-11-04T13:01:56Z | ||
| ES | Laboratory of I2T Research Group, Faculty of Engineering, University of the Basque Country, Bilbao, Basque Country, Spain. | I2T Research Group | Internet | OpenAccess | No | 2014-03-04T11:35:15Z |
| FR | INRIA, Rocquencourt (near Paris), France | France/Europe | OpenAccess | Yes | 2004-09-25T14:26:54Z | |
| FR | SYRTE, Observatoire de Paris, Paris, France | France/Europe | RestrictedAccess | Yes | 2009-12-21T16:50:30Z | |
| FR | INRIA, Sophia Antipolis (French Riviera, near Nice), France | RENATER, R3T2, France/Europe | RestrictedAccess | No | 2004-09-25T14:36:00Z | |
| FR | University of Rennes 1, Britany, France | France/Europe | RestrictedAccess | Yes | 2004-09-25T14:28:23Z | |
| GR | Athens, Greece | Worldwide | OpenAccess | No | 2011-03-03T08:34:55Z | |
| HK | Hong Kong | Hong Kong | OpenAccess | No | 2013-02-18T20:40:37Z | |
| HK | OpenAccess | Yes | 2005-02-06T00:07:00Z | |||
| HK | The Chinese University of Hong Kong | Hong Kong, China and South East Asia | OpenAccess | No | 2012-05-18T01:30:24Z | |
| IE | Dept. of Information Technology, National University of Ireland, Galway, Ireland | Ireland, UK | OpenAccess | Yes | 2004-09-25T14:41:50Z | |
| IE | Rosslare Strand | OpenAccess | Yes | 2012-12-26T11:17:47Z | ||
| IN | india | india | OpenAccess | Yes | 2014-01-27T06:30:36Z | |
| IQ | Iraq - Baghdad | Iraq | OpenAccess | Yes | 2013-04-12T10:37:40Z | |
| IQ | Iraq - Baghdad | OpenAccess | Yes | 2012-03-31T00:36:51Z | ||
| IQ | Iraq - Sulaimaniyah | OpenAccess | Yes | 2012-03-30T14:25:53Z | ||
| IS | Iceland | Iceland | RestrictedAccess | No | 2012-11-09T10:45:51Z | |
| IT | I.N.RI.M. - Torino, Italy | Italy/Europe | OpenAccess | Yes | 2007-01-24T15:27:43Z | |
| IT | INRI.M.-Torino,Italia | Italia/Europa | OpenAccess | Yes | 2014-01-30T14:35:12Z | |
| IT | I.N.RI.M. - Torino, Italy | Italy/Europe | OpenAccess | Yes | 2007-01-24T15:00:30Z | |
| IT | INRI.M.-Torino, Italia | Italia / Europa | OpenAccess | Yes | 2014-01-30T14:45:59Z | |
| JP | National Institute of Information and Communications Technology (Tokyo, JAPAN) | Japan and Asia | OpenAccess | No | 2007-03-27T04:30:14Z | |
| JP | Fukuoka university, Fukuoka, Japan | Japan/Pacific area | OpenAccess | No | 2004-09-25T14:52:00Z | |
| JP | Fukuoka university, Fukuoka, Japan | Japan/Pacific area | OpenAccess | No | 2004-09-25T14:50:00Z | |
| KR | Republic of Korea | OpenAccess | No | 2012-12-30T01:30:40Z | ||
| MD | Europe, Moldova, Chisinau | Moldova | OpenAccess | No | 2013-02-18T20:23:32Z | |
| MD | Chisinau, Republic of Moldova | Trabia-Network | Global | OpenAccess | No | 2013-04-21T10:02:17Z |
| MX | Laboratorio de Ciencias Físicas. Estado de México, México | Laboratorio de Ciencias Físicas. (LCF México) | Continente Americano/American Continent | OpenAccess | No | 2013-08-30T21:01:41Z |
| MX | Centro Nacional de Metrologia, Queretaro, Mexico | All Mexico and USA | OpenAccess | No | 2004-09-25T14:53:18Z | |
| MX | Comisión de Planeación Universitaria, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, México | Mexico, North America, Latin America and Caribbean | OpenAccess | Yes | 2010-11-12T19:46:54Z | |
| MX | Promomedios' corporate headquarters in Guadalajara, Jalisco, Mexico. | Mexico via UniNet network and worldwide | OpenAccess | No | 2008-10-06T17:38:27Z | |
| NL | Donkerbroek, Netherlands | Netherlands | OpenAccess | No | 2010-08-29T06:06:04Z | |
| NL | Huizen | Worldwide | OpenAccess | Yes | 2011-02-17T13:33:07Z | |
| NL | Verizon, Rotterdam, The Netherlands | The Netherlands/Europe | OpenAccess | No | 2007-07-11T12:45:50Z | |
| NL | Hilversum, Netherlands | worldwide | OpenAccess | Yes | 2008-12-20T10:50:07Z | |
| NL | Bergschenhoek | Helux | NL | OpenAccess | Yes | 2013-08-25T11:08:35Z |
| NL | Verizon, Amsterdam, The Netherlands | The Netherlands/Europe | OpenAccess | No | 2007-07-11T12:47:17Z | |
| NL | Hilversum, The Netherlands | worldwide | OpenAccess | Yes | 2012-01-12T04:30:35Z | |
| NL | NLnet, Amsterdam, The Netherlands | The Netherlands/Europe | OpenAccess | No | 2004-09-25T14:58:00Z | |
| NL | Spijkenisse, The Netherlands | Polaire | Netherlands | OpenAccess | Yes | 2013-07-02T09:09:18Z |
| NL | NLnet, Amsterdam, The Netherlands | he Netherlands/Europe | OpenAccess | No | 2004-09-25T15:03:03Z | |
| NL | Amsterdam, Netherlands | NLNOG RING | worldwide | OpenAccess | No | 2014-03-01T16:35:03Z |
| NL | MCI, Amsterdam, The Netherlands | The Netherlands/Europe | OpenAccess | No | 2005-12-20T10:38:18Z | |
| NL | NLnet, Amsterdam, The Netherlands | The Netherlands/Europe | OpenAccess | No | 2004-09-25T14:57:00Z | |
| NL | Gouda, The Netherlands | NL | OpenAccess | Yes | 2010-03-05T15:39:03Z | |
| NL | Elst, Gelderland, The Netherlands | Worldwide | OpenAccess | No | 2008-04-02T22:13:12Z | |
| NO | The EDB Centre, University of Tromsoe, Norway | NORDUnet | RestrictedAccess | Yes | 2004-09-25T15:04:14Z | |
| NO | IT-Dept., University of Tromso, Norway | NORDUnet | ClosedAccess | Yes | 2007-03-02T09:47:49Z | |
| NZ | Wellington, New Zealand | New Zealand | OpenAccess | No | 2013-03-07T23:35:06Z | |
| NZ | New Zealand | New Zealand and Pacific Islands | RestrictedAccess | Yes | 2010-09-08T09:02:27Z | |
| PL | Polish Telecom, Warsaw, Poland | TPNET | OpenAccess | No | 2013-04-15T08:23:41Z | |
| PL | Warsaw, Poland | Public | OpenAccess | No | 2009-02-03T20:28:25Z | |
| PL | Polish Telecom, Warsaw, Poland | TPNET | OpenAccess | No | 2013-04-15T08:25:05Z | |
| PL | Unizeto Technologies S.A., ul. Krolowej Korony Polskiej 21, 70-486 Szczecin, Polska | Internet | OpenAccess | No | 2009-04-28T10:20:46Z | |
| PL | Warsaw, Poland | Public | OpenAccess | No | 2010-02-27T15:48:03Z | |
| PL | Astrogeodynamical Observatory, Space Research Centre, Borowiec, Poland | Poland/Europe | OpenAccess | No | 2004-09-27T12:25:39Z | |
| PT | Arrifana, Santa Maria da Feira, Portugal | Portugal and Europe | RestrictedAccess | Yes | 2011-12-08T15:28:09Z | |
| PT | Arrifana, Santa Maria da Feira, Portugal | Portugal and Europe | RestrictedAccess | Yes | 2011-12-08T15:26:32Z | |
| RO | University of Suceava, Electrical Engineering and Computer Science Department, Suceava, 720229, Romania | Stefan cel Mare University of Suceava | Romania/Europe | OpenAccess | Yes | 2013-12-27T20:03:10Z |
| RO | University of Suceava, Electrical Engineering and Computer Science Department, Suceava, 720229, Romania | Stefan cel Mare University of Suceava | Romania/Europe - open to Stratum 2 servers only by request | OpenAccess | Yes | 2013-12-27T20:04:45Z |
| RO | University of Suceava, Electrical Engineering and Computer Science Department, Suceava, 720229, Romania | Stefan cel Mare University of Suceava | Romania/Europe | OpenAccess | Yes | 2013-12-27T20:03:53Z |
| RO | Suceava, 720236, Romania | Romania/Europe | RestrictedAccess | Yes | 2008-06-25T19:58:15Z | |
| RU | Novosibirsk, Russia | Russia | OpenAccess | Yes | 2013-02-23T05:47:32Z | |
| RU | Saratov | OpenAccess | Yes | 2012-09-11T21:34:11Z | ||
| RU | VNIIFTRI, Moscow region, Russia | All areas | OpenAccess | Yes | 2013-04-15T09:59:29Z | |
| RU | Moscow | OpenAccess | Yes | 2013-02-18T20:25:45Z | ||
| RU | Branch office VNIIFTRi, Irkutsk region, Russia | OpenAccess | Yes | 2012-11-01T02:01:18Z | ||
| RU | VNIIFTRI, Moscow region, Russia | All areas | OpenAccess | Yes | 2013-04-15T10:00:14Z | |
| RU | Saratov | OpenAccess | Yes | 2012-09-12T12:55:51Z | ||
| RU | Saratov | OpenAccess | Yes | 2012-09-12T12:54:46Z | ||
| RU | Novosibirsk, Russia | Russia | ClosedAccess | Yes | 2014-01-14T04:47:25Z | |
| RU | VNIIFTRI, Moscow region, Russia | All areas | OpenAccess | Yes | 2013-04-15T10:00:36Z | |
| RU | Izhevsk, Russia | Worldwide | OpenAccess | No | 2013-05-09T07:20:02Z | |
| RU | BCCVS RAMS, Moscow, Russia | worldwide | OpenAccess | No | 2012-12-27T16:16:27Z | |
| RU | US Embassy Moscow, Russia | US Embassy Moscow, Russia | Russia | OpenAccess | No | 2014-01-27T12:22:37Z |
| RU | Khabarovsk, Russia | Europe | OpenAccess | No | 2013-02-06T01:43:57Z | |
| RU | Vladivostok, Russia | Russia, Far East | ClosedAccess | Yes | 2006-06-19T03:33:45Z | |
| RU | Khabarovsk, Russia | Europe | OpenAccess | No | 2013-02-06T01:47:24Z | |
| RU | VNIIFTRI, Moscow region, Russia | All areas | OpenAccess | Yes | 2013-04-15T10:01:01Z | |
| RU | Branch office VNIIFTRI, Irkutsk region, Russia | OpenAccess | Yes | 2012-11-01T01:59:15Z | ||
| RU | Saratov | OpenAccess | Yes | 2012-09-11T21:35:04Z | ||
| SA | Saudi Arabia, Riyadh, KACST/ISU | Worldwide | OpenAccess | Yes | 2012-04-15T14:17:35Z | |
| SA | Saudi Arabia, Riyadh, KACST/ISU | Worldwide | OpenAccess | Yes | 2012-04-15T14:17:39Z | |
| SE | Netnod Internet Exchange i Sverige AB, Stockholm, SWEDEN (Exchange point Stockholm, Sweden) | all areas | OpenAccess | No | 2009-09-17T13:11:48Z | |
| SE | Lysator Academic Computer Society at Linköping University | all areas | OpenAccess | No | 2013-02-18T20:42:59Z | |
| SE | SP Swedish National Testing and Research Institute, BORAS, SWEDEN | all areas | OpenAccess | No | 2004-09-27T01:54:31Z | |
| SE | OpenBSD.se, Uppsala, Sweden. statistics | all areas | OpenAccess | No | 2009-08-15T10:23:10Z | |
| SE | Netnod Internet Exchange i Sverige AB, Stockholm, SWEDEN (Exchange point Stockholm, Sweden) | all areas | OpenAccess | No | 2009-09-17T13:13:32Z | |
| SE | Netnod Internet Exchange i Sverige AB, Stockholm, SWEDEN (Exchange point Gothenburg, Sweden) | all areas | OpenAccess | No | 2009-09-17T13:12:45Z | |
| SE | SP Swedish National Testing and Research Institute, BORAS, SWEDEN | all areas | OpenAccess | No | 2004-09-27T01:52:20Z | |
| SE | SP Technical Research Institute of Sweden, Stockholm Sweden | worldwide | OpenAccess | No | 2013-06-27T12:37:26Z | |
| SE | Stupi AB, Stockholm, SWEDEN | SUnet, NORDUnet | OpenAccess | No | 2012-12-10T17:35:48Z | |
| SE | OpenBSD.se, Uppsala, Sweden. statistics | all areas | OpenAccess | No | 2009-08-15T10:23:57Z | |
| SE | Netnod Internet Exchange i Sverige AB, Stockholm, SWEDEN (Exchange point Malmoe, Sweden) | all areas | OpenAccess | No | 2009-09-17T13:13:11Z | |
| SE | SP Technical Research Institute of Sweden, Borås Sweden | OpenAccess | No | 2013-01-15T09:27:48Z | ||
| SE | SP Technical Research Institute of Sweden, Borås Sweden | OpenAccess | No | 2013-01-15T09:44:50Z | ||
| SE | SP Technical Research Institute of Sweden, Stockholm Sweden | OpenAccess | No | 2013-01-15T09:41:21Z | ||
| SE | Stupi AB, Stockholm, SWEDEN | Europe | OpenAccess | No | 2012-12-10T17:36:14Z | |
| SE | Netnod Internet Exchange i Sverige AB, Stockholm, SWEDEN (Exchange point Malmoe, Sweden) | all areas | OpenAccess | No | 2009-09-17T13:11:35Z | |
| SE | Netnod Internet Exchange i Sverige AB, Stockholm, SWEDEN (Exchange point Gothenburg, Sweden) | all areas | OpenAccess | No | 2009-09-17T14:00:23Z | |
| SG | SingNet, Singapore | STIX/Asia (outside Singapore), others by arrangement | RestrictedAccess | Yes | 2004-09-27T02:08:00Z | |
| SG | SG | DCS1 | Worldwide | OpenAccess | Yes | 2013-08-18T05:07:40Z |
| SG | Singapore | 0x.sg | Singapore and Asia | OpenAccess | No | 2013-09-10T22:03:38Z |
| SG | SPRING Singapore | Singapore and Asia | RestrictedAccess | Yes | 2004-09-27T02:07:36Z | |
| SI | "J. Stefan" Institute, Ljubljana, Slovenia | Slovenia, European academic community, others by arrangement | RestrictedAccess | Yes | 2005-03-04T01:13:03Z | |
| SI | Slovenia, Ljubljana | Slovenia and neighbouring countries | OpenAccess | No | 2012-08-28T19:01:22Z | |
| SI | MMC Mostovna, Nova Gorica, Slovenija | Slovenia, Ex-Yugoslavia academic community, others by arrangement | OpenAccess | Yes | 2006-07-22T17:58:28Z | |
| TR | Turkey | Wordwide | OpenAccess | Yes | 2014-02-07T14:30:01Z | |
| TW | Taiwan | National Time and Frequency Standard Laboratory | Taiwan | OpenAccess | No | 2014-02-26T20:20:54Z |
| UA | Kiev, Ukraine | Central and Easten Europe | OpenAccess | Yes | 2013-02-18T20:33:08Z | |
| UA | ISP ColoCall, DC Bunker, Kiev, Ukraine | Central and Easten Europe | OpenAccess | Yes | 2011-08-26T10:37:27Z | |
| UA | ISP ColoCall, Kiev, Ukraine | Central and Easten Europe | OpenAccess | Yes | 2011-08-27T20:08:11Z | |
| UK | Farningham, UK | UK/North West Europe | RestrictedAccess | Yes | 2010-12-19T16:25:35Z | |
| UK | Computing Systems Research Ltd. United Kingdom | United Kingdom Western Europe | OpenAccess | No | 2011-05-09T16:10:37Z | |
| UK | Dartford, UK | RestrictedAccess | No | 2012-09-06T14:58:17Z | ||
| UK | Surrey, England, UK | Europe | RestrictedAccess | Yes | 2014-02-11T14:56:31Z | |
| UK | High Wycombe | UK / Europe | RestrictedAccess | Yes | 2013-03-14T10:15:40Z | |
| UK | University of London Computer Centre, UK | JANET | ClosedAccess | Yes | 2004-09-27T02:17:55Z | |
| US AK | University of Alaska, Fairbanks, AK | Pacific Northwest, others by arrangement | RestrictedAccess | Yes | 2004-11-29T03:10:56Z | |
| US AZ | Thunderbird School of Global Managment, Glendale, Arizona | Western US | RestrictedAccess | Yes | 2008-06-23T18:13:21Z | |
| US CA | Layer42, Santa Clara, CA | Western US | OpenAccess | No | 2006-12-12T02:38:04Z | |
| US CA | Sunnyvale, CA US | Western US | RestrictedAccess | No | 2004-09-27T02:25:34Z | |
| US CA | USC Information Sciences Institute, Marina del Rey, CA | CalRen2, Los Nettos region | OpenAccess | No | 2004-09-27T02:39:22Z | |
| US CA | GPSClock.com headquarters, Redondo Beach, CA | US Pacific, Los Angeles area | RestrictedAccess | No | 2004-09-27T02:40:36Z | |
| US CA | Los Angeles, CA | US | OpenAccess | No | 2012-03-02T22:38:27Z | |
| US CA | Deep Space Imaging, Valencia, CA | Worldwide | OpenAccess | No | 2010-12-22T19:12:42Z | |
| US CA | California Institute of Technology, Pasadena, CA | USA Pacific timezone, others by arrangement | RestrictedAccess | Yes | 2004-11-29T03:36:47Z | |
| US CA | Sausalito CA | Within 60ms RTT | OpenAccess | Yes | 2005-02-25T19:22:00Z | |
| US CA | AOL Time Warner facility, Sunnyvale, California | Western US | OpenAccess | No | 2005-08-19T20:13:29Z | |
| US CA | Mar Vista, California, USA, Earth | ZiaSpace | Southern California, Nevada, Arizona | OpenAccess | Yes | 2014-01-04T04:23:06Z |
| US CA | Cupertino CA (SF Bay area) | West Coast USA | OpenAccess | No | 2004-09-27T02:33:24Z | |
| US CA | Hewlett-Packard Corp. , Palo Alto, CA | USA Pacific and Mountain timezones, others by arrangement. | RestrictedAccess | Yes | 2007-11-29T04:40:07Z | |
| US CA | University of Colorado, Boulder, Colorado | US | OpenAccess | Yes | 2008-03-05T20:26:01Z | |
| US CA | Internet Software Consortium, Palo Alto, CA | BARRnet, Alternet-west, CIX-west | OpenAccess | No | 2005-03-24T23:12:51Z | |
| US CA | Deep Space Imaging, Valencia, CA | Worldwide | OpenAccess | No | 2010-12-22T19:14:36Z | |
| US CA | NASA Ames Research Center, Moffett Field, CA | NSFNET, BARR region, NASA NSN, DOE ESNET, DDN | ClosedAccess | Yes | 2004-09-27T02:34:39Z | |
| US CA | Los Angeles, California | OpenAccess | No | 2008-04-19T17:51:27Z | ||
| US CA | GPSClock.com headquarters, Redondo Beach, CA | US Pacific, Los Angeles area | RestrictedAccess | No | 2004-09-27T02:36:01Z | |
| US CA | Symmetricom, (formerly Datum), San Jose, California | Primarily networks in Western US | OpenAccess | No | 2006-08-28T15:54:25Z | |
| US CA | Hurricane Electric, Fremont, California | all areas | OpenAccess | No | 2005-04-06T14:02:40Z | |
| US CA | Hurricane Electric, San Jose, California | all areas | OpenAccess | No | 2005-04-06T14:02:02Z | |
| US CA | HP Western Research Laboratory, Palo Alto, CA | NSFNET, BARR region | OpenAccess | No | 2004-09-27T02:21:15Z | |
| US CA | ViaNet Communications, Palo Alto, CA, USA | All areas | OpenAccess | Yes | 2005-04-15T13:23:13Z | |
| US CA | UCLA, Los Angeles, CA | Pacific time zone, others on request | RestrictedAccess | Yes | 2004-11-29T02:54:03Z | |
| US CA | San Jose, California | Western US | OpenAccess | No | 2006-12-14T17:51:40Z | |
| US CO | NIST Boulder Laboratories, Boulder, Colorado | NSFnet, WESTnet | OpenAccess | No | 2005-08-19T20:41:29Z | |
| US CO | JILA Laboratory, University of Colorado | Western US | OpenAccess | No | 2005-08-19T20:29:00Z | |
| US CO | NIST Boulder Laboratories, Boulder, Colorado | NSFnet, WESTnet | OpenAccess | No | 2005-08-19T20:37:25Z | |
| US CO | Schriever, Colorado | USA Pacific and Mountain time zones, others by arrangement. | RestrictedAccess | Yes | 2004-11-29T03:29:00Z | |
| US CO | NIST Boulder Laboratories, Boulder, Colorado | NSFnet, WESTnet | ClosedAccess | No | 2005-08-19T20:44:09Z | |
| US CO | NIST Boulder Laboratories, Boulder, Colorado | NSFnet, WESTnet | OpenAccess | No | 2005-08-19T20:41:00Z | |
| US CO | NIST Laboratory, Boulder, Colorado | Open | RestrictedAccess | Yes | 2008-03-01T21:54:23Z | |
| US CO | National Center for Atmospheric Research, Boulder, Colorado | NSFnet, WESTnet | OpenAccess | No | 2007-04-06T15:22:35Z | |
| US CO | Schriever, Colorado | US Pacific, Mountain time zones, others by arrangement | RestrictedAccess | Yes | 2013-02-18T20:43:37Z | |
| US DC | U.S. Naval Observatory, Washington, DC | Eastern Time Zone, others by arrangement | RestrictedAccess | Yes | 2004-11-29T02:38:00Z | |
| US DC | U.S. Naval Observatory, Washington, DC | USA Eastern timezone, others by arrangement | RestrictedAccess | Yes | 2004-11-29T02:46:24Z | |
| US DC | U.S. Naval Observatory, Washington, DC | Eastern Time Zone, others by arrangement | RestrictedAccess | Yes | 2004-11-29T02:45:00Z | |
| US DE | ECE Department, University of Delaware, Newark, DE 19716 | interplanetary | OpenAccess | No | 2013-05-31T23:56:12Z | |
| US DE | ECE Department, University of Delaware, Newark, DE 19716 | interplanetary | RestrictedAccess | No | 2013-05-31T23:56:53Z | |
| US DE | ECE Department, University of Delaware, Newark, DE 19716 | US east | OpenAccess | No | 2007-10-13T05:17:52Z | |
| US DE | University of Delaware, Newark, DE | BBN Planet SER | ClosedAccess | Yes | 2004-09-27T03:11:00Z | |
| US DE | PEPCO Holdings Inc., 500 N Wakefield Dr., Newark DE | AT&T and QWEST | OpenAccess | No | 2009-03-27T16:23:28Z | |
| US FL | CSN Central Florida | Florida and Global | OpenAccess | Yes | 2013-09-22T06:09:34Z | |
| US FL | University of Florida, Gainesville, FL | Eastern time zone US | RestrictedAccess | Yes | 2004-11-29T03:06:32Z | |
| US GA | Georgia Institute of Technology, Atlanta, GA | USA Eastern timezone, others by arrangement | RestrictedAccess | Yes | 2004-11-29T03:31:10Z | |
| US GA | Columbia County, Georgia | OpenAccess | No | 2005-08-19T22:05:36Z | ||
| US HI | Maui High Performance Computing Center | Hawaii, others on request | RestrictedAccess | Yes | 2004-11-29T03:02:41Z | |
| US IA | Griswold, IA | Griswold Community Schools, Griswold, IA | OpenAccess | Yes | 2013-07-08T13:54:32Z | |
| US IL | University of Illinois, Urbana-Champaign, IL | CICNET, Midwest, NCSA region | ClosedAccess | Yes | 2004-09-27T03:24:52Z | |
| US IL | Chicago, IL | North America | OpenAccess | No | 2007-12-05T13:40:06Z | |
| US IN | CERIAS, Purdue University, West Lafayette, IN | Internet2, CIC and midwest US | RestrictedAccess | Yes | 2010-02-03T03:38:10Z | |
| US IN | CERIAS, Purdue University, West Lafayette, IN | North America | RestrictedAccess | Yes | 2010-02-03T03:42:39Z | |
| US IN | LSC, Indianapolis Public Library, Indianapolis, IN, USA | North America | RestrictedAccess | Yes | 2010-10-20T17:30:57Z | |
| US IN | CERIAS, Purdue University, West Lafayette, IN | Internet2, CIC and midwest US | RestrictedAccess | Yes | 2010-02-03T03:37:07Z | |
| US MA | Massachusetts Institute of Technology, Cambridge, MA | Eastern US | OpenAccess | Yes | 2004-09-27T03:31:46Z | |
| US MA | Marblehead, MA | Eastern US | RestrictedAccess | No | 2013-07-16T12:29:42Z | |
| US MA | Cambridge, MA | Eastern US | OpenAccess | No | 2004-09-27T03:38:00Z | |
| US MD | NIST Central Computer Facility, Gaithersburg, Maryland | NSFnet, SURAnet | OpenAccess | No | 2005-08-19T21:35:18Z | |
| US MD | University of Maryland, College Park, MD | NSFNET, SURA region | ClosedAccess | Yes | 2004-09-27T03:41:13Z | |
| US MD | NIST Central Computer Facility, Gaithersburg, Maryland | NSFnet, SURAnet | OpenAccess | No | 2005-08-19T21:33:51Z | |
| US ME | Colby College, Waterville, ME | Northeastern US and Canada, others by arrangement | RestrictedAccess | Yes | 2007-04-19T19:48:47Z | |
| US MI | Monroe (Detroit), Michigan | US, Midwest | OpenAccess | No | 2008-03-01T21:23:24Z | |
| US MI | Essexville, MI | DigitalEnigma Networks, LLC | North America; US | RestrictedAccess | No | 2014-01-31T20:07:32Z |
| US MI | Southfield, Michigan | Open | OpenAccess | Yes | 2007-11-21T21:04:28Z | |
| US MI | Essexville, MI | DigitalEnigma Networks, LLC | North America; US | RestrictedAccess | No | 2014-01-31T20:07:47Z |
| US MO | Washington University, St. Louis, MO | USA Central timezone, others by arrangement. | RestrictedAccess | Yes | 2004-11-29T03:20:23Z | |
| US NC | MCNC, Research Triangle Park, NC | NC-REN region | RestrictedAccess | No | 2004-09-27T03:45:46Z | |
| US NC | North Carolina State University, Raleigh, NC | South Eastern US | OpenAccess | No | 2004-09-27T03:46:59Z | |
| US NJ | Jensen Research Corporation, Ramsey NJ | Eastern US | RestrictedAccess | Yes | 2011-12-02T03:15:30Z | |
| US NY | Hurricane Electric, New York City, New York | all areas | OpenAccess | No | 2005-04-06T14:03:22Z | |
| US NY | New York City, New York | North Eastern US | OpenAccess | No | 2008-03-01T21:26:08Z | |
| US NY | Morningside Campus, Columbia University, New York, NY | NYSERnet | RestrictedAccess | No | 2011-06-08T18:21:42Z | |
| US OK | Oklahoma State University, Stillwater, OK | Central Time Zone, others by arrangement | RestrictedAccess | Yes | 2004-11-29T03:13:39Z | |
| US OK | Edmond, Oklahoma | Any | OpenAccess | No | 2014-02-02T21:17:09Z | |
| US OR | Hillsboro, OR | OpenAccess | No | 2011-06-09T19:47:21Z | ||
| US PA | Penn State University, University Park, PA | Internet2, PSC/3ROX | OpenAccess | Yes | 2009-11-05T21:21:53Z | |
| US PA | BurstNET Technologies, Inc. - Dunmore, PA USA | Global | OpenAccess | No | 2013-07-16T18:08:51Z | |
| US PA | Penn State University, University Park, PA | NSFNET, PREPNET, JvNCnet | OpenAccess | No | 2009-11-05T17:21:13Z | |
| US PA | Penn State University, University Park, PA | Internet2, vBNS, CERFnet(AT&T IP Services), PSC/NCNE, CASC | ClosedAccess | Yes | 2009-11-05T17:20:27Z | |
| US PA | BurstNET Technologies, Inc. - Dunmore, PA USA | Global | OpenAccess | No | 2013-07-16T18:05:08Z | |
| US PA | Milford, PA, 18337 | Mel's Place | Mel's Place | ClosedAccess | Yes | 2013-09-01T01:09:28Z |
| US TX | University of Houston, Houston, TX | US Central time zone, others on request | RestrictedAccess | Yes | 2004-11-29T02:52:16Z | |
| US TX | AT&T CLLI SANGTX01 (San Angelo, TX) | Quintex Alliance Consulting | Texas/US Central, Stratum 1/2 Servers only. | RestrictedAccess | Yes | 2014-02-04T21:31:45Z |
| US UT | XMission Internet, Salt Lake City, Utah | Western US | OpenAccess | No | 2012-11-25T00:07:37Z | |
| US UT | Salt Lake City, Utah, USA | XMission | Rocky Mountain West | OpenAccess | No | 2013-11-07T17:16:44Z |
| US VA | McLean, VA | Primarily networks in Eastern US | OpenAccess | No | 2007-04-06T15:18:00Z | |
| US WA | Seattle, WA | Washington - Oregon | OpenAccess | No | 2010-08-20T02:57:50Z | |
| US WA | University of Washington, Seattle, WA | Pacific Northwest | RestrictedAccess | Yes | 2004-11-29T03:39:01Z | |
| US WA | Microsoft Corporation, Seattle, Washington | NorthWestNet, NSFnet | OpenAccess | No | 2007-11-21T21:09:07Z | |
| US WI | Netwrx Consulting Inc. | Global | OpenAccess | Yes | 2012-02-10T23:55:15Z | |
| US WI | Netwrx Consulting Inc. | Global | OpenAccess | Yes | 2012-02-10T23:53:19Z | |
| US WI | Computer Science Department, University of Wisconsin-Madison | US/any | RestrictedAccess | Yes | 2004-09-27T04:19:16Z | |
| br | ipatinga,mg,brasil | brazil | OpenAccess | Yes | 2014-01-11T19:56:09Z |
Topic revision: r15 - 2013-04-11 - 21:12:10 - SteveKostecke
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