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Telephone Time

USNO provides both voice announcements of the time, and services to synchronize systems over telephone modems.

Voice Announcers

The voice announcements have the same pattern at both sites, and always begin with the local time (daylight or standard). The local time announcements are made on the minute, and 15, 30, and 45 seconds after the minute. Coordinated Universal Time (UTC) is announced five seconds after the local time.
Time may be delayed on long distance calls.

Time Voice Announcer, Washington, DC:       

  • 202-762-1401
  • 202-762-1069
  • DSN 762-1401
  • DSN 762-1069

Time Voice Announcer, Colorado Springs, CO:

  • 719-567-6742 
  • DSN 560-6742

Digital Time for MODEMS

These MODEMS operate at 1200 baud, 8N1 only.

From Washington, DC:           

  • 202-762-1594
  • DSN 762-1594

From Colorado Springs, CO:      

  • 719-567-6743
  • DSN 560-6743

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