| 791 | Internet ProtocolJ. Postel | Internet Standard | September 1981 |
| 793 | Transmission Control ProtocolJ. Postel · obsoleted by RFC 9293 | Internet Standard | September 1981 |
| 1122 | Requirements for Internet Hosts - Communication LayersR. Braden, Ed. | Internet Standard | October 1989 |
| 1323 | TCP Extensions for High PerformanceV. Jacobson, R. Braden, D. Borman · obsoleted by RFC 7323 | Proposed Standard | May 1992 |
| 1379 | Extending TCP for Transactions -- ConceptsR. Braden · obsoleted by RFC 6247 | Historic | November 1992 |
| 1644 | T/TCP -- TCP Extensions for Transactions Functional SpecificationR. Braden · obsoleted by RFC 6247 | Historic | July 1994 |
| 1700 | Assigned NumbersJ. Reynolds, J. Postel · obsoleted by RFC 3232 | Historic | October 1994 |
| 1948 | Defending Against Sequence Number AttacksS. Bellovin · obsoleted by RFC 6528 | Informational | May 1996 |
| 2018 | TCP Selective Acknowledgment OptionsM. Mathis, J. Mahdavi, S. Floyd, A. Romanow | Proposed Standard | October 1996 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2385 | Protection of BGP Sessions via the TCP MD5 Signature OptionA. Heffernan · obsoleted by RFC 5925 | Proposed Standard | August 1998 |
| 2522 | Photuris: Session-Key Management ProtocolP. Karn, W. Simpson | Experimental | March 1999 |
| 2827 | Network Ingress Filtering: Defeating Denial of Service Attacks which employ IP Source Address SpoofingP. Ferguson, D. Senie | Best Current Practice | May 2000 |
| 2960 | Stream Control Transmission ProtocolR. Stewart, Q. Xie, K. Morneault, C. Sharp, H. Schwarzbauer, T. Taylor, I. Rytina, M. Kalla, L. Zhang, V. Paxson · obsoleted by RFC 4960 | Proposed Standard | October 2000 |
| 2988 | Computing TCP's Retransmission TimerV. Paxson, M. Allman · obsoleted by RFC 6298 | Proposed Standard | November 2000 |
| 3022 | Traditional IP Network Address Translator (Traditional NAT)P. Srisuresh, K. Egevang | Informational | January 2001 |
| 3232 | Assigned Numbers: RFC 1700 is Replaced by an On-line DatabaseJ. Reynolds, Ed. | Informational | January 2002 |
| 3234 | Middleboxes: Taxonomy and IssuesB. Carpenter, S. Brim | Informational | February 2002 |
| 3309 | Stream Control Transmission Protocol (SCTP) Checksum ChangeJ. Stone, R. Stewart, D. Otis · obsoleted by RFC 4960 | Proposed Standard | September 2002 |
| 3552 | Guidelines for Writing RFC Text on Security ConsiderationsE. Rescorla, B. Korver | Best Current Practice | July 2003 |
| 3692 | Assigning Experimental and Testing Numbers Considered UsefulT. Narten | Best Current Practice | January 2004 |
| 3704 | Ingress Filtering for Multihomed NetworksF. Baker, P. Savola | Best Current Practice | March 2004 |
| 4086 | Randomness Requirements for SecurityD. Eastlake 3rd, J. Schiller, S. Crocker | Best Current Practice | June 2005 |
| 4340 | Datagram Congestion Control Protocol (DCCP)E. Kohler, M. Handley, S. Floyd | Proposed Standard | March 2006 |
| 4727 | Experimental Values In IPv4, IPv6, ICMPv4, ICMPv6, UDP, and TCP HeadersB. Fenner | Proposed Standard | November 2006 |
| 4732 | Internet Denial-of-Service ConsiderationsM. Handley, Ed., E. Rescorla, Ed., IAB | Informational | December 2006 |
| 4953 | Defending TCP Against Spoofing AttacksJ. Touch | Informational | July 2007 |
| 4960 | Stream Control Transmission ProtocolR. Stewart, Ed. · obsoleted by RFC 9260 | Proposed Standard | September 2007 |
| 4987 | TCP SYN Flooding Attacks and Common MitigationsW. Eddy | Informational | August 2007 |
| 5077 | Transport Layer Security (TLS) Session Resumption without Server-Side StateJ. Salowey, H. Zhou, P. Eronen, H. Tschofenig · obsoleted by RFC 8446, RFC 9846 | Proposed Standard | January 2008 |
| 5358 | Preventing Use of Recursive Nameservers in Reflector AttacksJ. Damas, F. Neves | Best Current Practice | October 2008 |
| 5452 | Measures for Making DNS More Resilient against Forged AnswersA. Hubert, R. van Mook | Proposed Standard | January 2009 |
| 5482 | TCP User Timeout OptionL. Eggert, F. Gont | Proposed Standard | March 2009 |
| 5681 | TCP Congestion ControlM. Allman, V. Paxson, E. Blanton | Draft Standard | September 2009 |
| 5741 | RFC Streams, Headers, and BoilerplatesL. Daigle, Ed., O. Kolkman, Ed., IAB · obsoleted by RFC 7841 | Informational | December 2009 |
| 5925 | The TCP Authentication OptionJ. Touch, A. Mankin, R. Bonica | Proposed Standard | June 2010 |
| 6056 | Recommendations for Transport-Protocol Port RandomizationM. Larsen, F. Gont | Best Current Practice | January 2011 |