Click here to read the current documentation (4.2.8-series).
Archived documentation for older major NTP releases is available:
In addition to the implementation documentation, the following resources are available:
- 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: Provides an interface to browse or search for a public primary or secondary time server.
- comp.protocols.time.ntp: Google group. Includes postings from original Usenet newsgroup going back to June, 1990.