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The Network Time Protocol Version 4 Algorithm Specification

Document Type Expired Internet-Draft (ntp WG)
Expired & archived
Author William Kasch
Last updated 2017-05-25 (Latest revision 2005-11-15)
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Additional resources Mailing list discussion
Stream WG state Dead WG Document
Document shepherd (None)
IESG IESG state Expired
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


The Network Time Protocol (NTP) is widely used to synchronize computer clocks in the Internet. This memorandum describes the algorithms used by Version 4 of the NTP (NTPv4) to calculate time values.


William Kasch

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)