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DoD Customers

We strongly suggest that DoD users _NOT_ use the following servers:

Authenticated NTP

USNO offers authenticated NTP service to DoD and U.S. Government agencies operatiing on the NIPR and SIPR networks. To obtain information on the servers and/or a key for authentication, please provide the following information in the form located at the following link, selecting NTP as the Subject: Time Help.
  • POC Name:
  • POC Phone Number:
  • POC Email (prefer unclass):
  • Organization:
  • DoD organization you're supporting (if different):
  • What keys are needed (NIPR, SIPR, or both):
  • What type of key (MD5, SHA1):
USNO Master Clock Time
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