Windows Time Auditor


National Time Sources & Access Policies

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PresenTense NTP Auditor references sources of legal time. Depending on your jurisdiction, the availability of legal time will vary. If you know of a source of legal time in your country which is not listed here, kindly notify us at support@bytefusion.com.

 

United States of America

 

Authority: U.S. Naval Observatory, Washington, DC

DNS: ntp2.usno.navy.mil

Service Area: USA Eastern time zone

Public Access: stratum-2 time servers only please

 

Authority: NASA Lewis Research Center, Cleveland, Ohio

DNS: lerc-dns.lerc.nasa.gov

Service Area: NSFNET, OARNET

Public Access: open

 

Authority: National Center for Atmospheric Research, Boulder, Colorado

DNS: time.nist.gov

Service Area: NSFnet, WESTnet

Public Access: stratum-2 time servers only please

 

Authority: NIST Boulder Laboratories, Boulder, Colorado

DNS: time-a.timefreq.bldrdoc.gov

Service Area: NSFnet, WESTnet

Public Access: stratum-2 time servers only please

 

Switzerland

 

Authority: Swiss Federal Institute. of Technology, Zurich

DNS: swisstime.ethz.ch

Service Area: Switzerland/Europe

Public Access: open

 

Sweden

 

Authority: Swedish National Testing and Research Institute, Boras

DNS: ntp1.sp.se

Service Area: Global

Public Access: open

 

Germany

 

Authority: National Institute of Natural and Engineering Sciences (PTB)

DNS: ptbtime1.ptb.de

Service Area: Europe

Public Access: open, please notify ntp-admin@ptb.de

 

Italy

 

Authority: Istituto Elettrotecnico Nazionale Galileo Ferraris, Torino

DNS: ntp1.ien.it

Service Area: Europe

Public Access: open, please notify ntp.info@ien.it

 

Mexico

 

Authority: Centro Nacional de Metrologia, Queretaro

DNS: cronos.cenam.mx

Service Area: Mexico and USA

Public Access: open

 

 

 


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