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
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
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