Official Internet protocols

This specification has been revised 7 times since RFC 840 (1983). Each document below formally obsoleted the one before it; the versions still in force are listed first.

Revision timeline

Current version — implement against this

RFC 1011Official Internet protocolsUpdated
May 1987

Superseded versions — historical reference only

RFC 840Official protocolsObsoleted
April 1983historicreplaced by RFC880
RFC 880Official protocolsObsoleted
October 1983historicreplaced by RFC901
RFC 901Official ARPA-Internet protocolsObsoleted
June 1984replaced by RFC924
RFC 924Official ARPA-Internet protocols for connecting personal computers to the InternetObsoleted
October 1984replaced by RFC944
RFC 944Official ARPA-Internet protocolsObsoleted
April 1985replaced by RFC961
RFC 961Official ARPA-Internet protocolsObsoleted
December 1985replaced by RFC991
RFC 991Official ARPA-Internet protocolsObsoleted
November 1986replaced by RFC1011

This lineage is derived automatically from the “obsoletes” relationships recorded in the public RFC Editor index — no editorial judgement is applied to the ordering. The most recent document in the chain is RFC 1011 (May 1987).