The NTP Project

The NTP Project produces a reference implementation of the NTP protocol, and implementation documentation, through a largely a volunteer effort. The NTP software distribution is copyrighted, as described in the NTP copyright page.

A list of reference clocks, ntp documentation, time and frequency standard stations, and time and frequency standard station transmission data is maintained at the Information on Time and Frequency Services page. Background information about NTP, along with briefings and a bibliography, are available at the Network Time Synchronization Project page.