Documentation

Click here to read the current documentation, applicable to NTP version 4.2.8 through 4.2.8p15.

Documentation Archives

Archived documentation for older major NTP releases is available:

Additional Information

  • Reference Library: Whitepapers, RFCs, and other technical documents written by Professor David L. Mills, inventor of NTP.
  • NTP Wiki: Community-contributed documentation.
  • NTP FAQ:Frequently Asked Questions about the NTP protocol and software distribution.
  • Public Time Server Lists: Browse or search for a public primary or secondary time server.
  • NTP Google group: Includes postings from original Usenet newsgroup going back to June, 1990.