| 768 | User Datagram ProtocolJ. Postel | Internet Standard | August 1980 |
| 793 | Transmission Control ProtocolJ. Postel · obsoleted by RFC 9293 | Internet Standard | September 1981 |
| 959 | File Transfer ProtocolJ. Postel, J. Reynolds | Internet Standard | October 1985 |
| 1078 | TCP port service Multiplexer (TCPMUX)M. Lottor · obsoleted by RFC 7805 | Historic | November 1988 |
| 1340 | Assigned NumbersJ. Reynolds, J. Postel · obsoleted by RFC 1700 | Historic | July 1992 |
| 1700 | Assigned NumbersJ. Reynolds, J. Postel · obsoleted by RFC 3232 | Historic | October 1994 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2780 | IANA Allocation Guidelines For Values In the Internet Protocol and Related HeadersS. Bradner, V. Paxson | Best Current Practice | March 2000 |
| 2782 | A DNS RR for specifying the location of services (DNS SRV)A. Gulbrandsen, P. Vixie, L. Esibov | Proposed Standard | February 2000 |
| 2957 | The application/whoispp-query Content-TypeL. Daigle, P. Faltstrom | Informational | October 2000 |
| 3232 | Assigned Numbers: RFC 1700 is Replaced by an On-line DatabaseJ. Reynolds, Ed. | Informational | January 2002 |
| 3692 | Assigning Experimental and Testing Numbers Considered UsefulT. Narten | Best Current Practice | January 2004 |
| 3828 | The Lightweight User Datagram Protocol (UDP-Lite)L-A. Larzon, M. Degermark, S. Pink, L-E. Jonsson, Ed., G. Fairhurst, Ed. | Proposed Standard | July 2004 |
| 4020 | Early IANA Allocation of Standards Track Code PointsK. Kompella, A. Zinin · obsoleted by RFC 7120 | Best Current Practice | March 2005 |
| 4340 | Datagram Congestion Control Protocol (DCCP)E. Kohler, M. Handley, S. Floyd | Proposed Standard | March 2006 |
| 4342 | Profile for Datagram Congestion Control Protocol (DCCP) Congestion Control ID 3: TCP-Friendly Rate Control (TFRC)S. Floyd, E. Kohler, J. Padhye | Proposed Standard | April 2006 |
| 4727 | Experimental Values In IPv4, IPv6, ICMPv4, ICMPv6, UDP, and TCP HeadersB. Fenner | Proposed Standard | November 2006 |
| 4844 | The RFC Series and RFC EditorL. Daigle, Ed., Internet Architecture Board · obsoleted by RFC 8729 | Informational | July 2007 |
| 4960 | Stream Control Transmission ProtocolR. Stewart, Ed. · obsoleted by RFC 9260 | Proposed Standard | September 2007 |
| 5226 | Guidelines for Writing an IANA Considerations Section in RFCsT. Narten, H. Alvestrand · obsoleted by RFC 8126 | Best Current Practice | May 2008 |
| 5234 | Augmented BNF for Syntax Specifications: ABNFD. Crocker, Ed., P. Overell | Internet Standard | January 2008 |
| 5237 | IANA Allocation Guidelines for the Protocol FieldJ. Arkko, S. Bradner | Best Current Practice | February 2008 |
| 5389 | Session Traversal Utilities for NAT (STUN)J. Rosenberg, R. Mahy, P. Matthews, D. Wing · obsoleted by RFC 8489 | Proposed Standard | October 2008 |
| 5595 | The Datagram Congestion Control Protocol (DCCP) Service CodesG. Fairhurst | Proposed Standard | September 2009 |
| 5741 | RFC Streams, Headers, and BoilerplatesL. Daigle, Ed., O. Kolkman, Ed., IAB · obsoleted by RFC 7841 | Informational | December 2009 |
| 5766 | Traversal Using Relays around NAT (TURN): Relay Extensions to Session Traversal Utilities for NAT (STUN)R. Mahy, P. Matthews, J. Rosenberg · obsoleted by RFC 8656 | Proposed Standard | April 2010 |