| 768 | User Datagram ProtocolJ. Postel | Internet Standard | August 1980 |
| 793 | Transmission Control ProtocolJ. Postel · obsoleted by RFC 9293 | Internet Standard | September 1981 |
| 896 | Congestion Control in IP/TCP InternetworksJ. Nagle · obsoleted by RFC 7805 | Historic | January 1984 |
| 919 | Broadcasting Internet DatagramsJ.C. Mogul | Internet Standard | October 1984 |
| 1112 | Host extensions for IP multicastingS.E. Deering | Internet Standard | August 1989 |
| 1122 | Requirements for Internet Hosts - Communication LayersR. Braden, Ed. | Internet Standard | October 1989 |
| 1191 | Path MTU discoveryJ. Mogul, S. Deering | Draft Standard | November 1990 |
| 1536 | Common DNS Implementation Errors and Suggested FixesA. Kumar, J. Postel, C. Neuman, P. Danzig, S. Miller | Informational | October 1993 |
| 1546 | Host Anycasting ServiceC. Partridge, T. Mendez, W. Milliken | Informational | November 1993 |
| 1981 | Path MTU Discovery for IP version 6J. McCann, S. Deering, J. Mogul · obsoleted by RFC 8201 | Draft Standard | August 1996 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2309 | Recommendations on Queue Management and Congestion Avoidance in the InternetB. Braden, D. Clark, J. Crowcroft, B. Davie, S. Deering, D. Estrin, S. Floyd, V. Jacobson, G. Minshall, C. Partridge, L. Peterson, K. Ramakrishnan, S. Shenker, J. Wroclawski, L. Zhang · obsoleted by RFC 7567 | Informational | April 1998 |
| 2460 | Internet Protocol, Version 6 (IPv6) SpecificationS. Deering, R. Hinden · obsoleted by RFC 8200 | Draft Standard | December 1998 |
| 2475 | An Architecture for Differentiated ServicesS. Blake, D. Black, M. Carlson, E. Davies, Z. Wang, W. Weiss | Informational | December 1998 |
| 2675 | IPv6 JumbogramsD. Borman, S. Deering, R. Hinden | Proposed Standard | August 1999 |
| 2743 | Generic Security Service Application Program Interface Version 2, Update 1J. Linn | Proposed Standard | January 2000 |
| 2914 | Congestion Control PrinciplesS. Floyd | Best Current Practice | September 2000 |
| 2988 | Computing TCP's Retransmission TimerV. Paxson, M. Allman · obsoleted by RFC 6298 | Proposed Standard | November 2000 |
| 3048 | Reliable Multicast Transport Building Blocks for One-to-Many Bulk-Data TransferB. Whetten, L. Vicisano, R. Kermode, M. Handley, S. Floyd, M. Luby | Informational | January 2001 |
| 3124 | The Congestion ManagerH. Balakrishnan, S. Seshan | Proposed Standard | June 2001 |
| 3261 | SIP: Session Initiation ProtocolJ. Rosenberg, H. Schulzrinne, G. Camarillo, A. Johnston, J. Peterson, R. Sparks, M. Handley, E. Schooler | Proposed Standard | July 2002 |
| 3303 | Middlebox communication architecture and frameworkP. Srisuresh, J. Kuthan, J. Rosenberg, A. Molitor, A. Rayhan | Informational | August 2002 |
| 3493 | Basic Socket Interface Extensions for IPv6R. Gilligan, S. Thomson, J. Bound, J. McCann, W. Stevens | Informational | March 2003 |
| 3550 | RTP: A Transport Protocol for Real-Time ApplicationsH. Schulzrinne, S. Casner, R. Frederick, V. Jacobson | Internet Standard | July 2003 |
| 3551 | RTP Profile for Audio and Video Conferences with Minimal ControlH. Schulzrinne, S. Casner | Internet Standard | July 2003 |
| 3711 | The Secure Real-time Transport Protocol (SRTP)M. Baugher, D. McGrew, M. Naslund, E. Carrara, K. Norrman | Proposed Standard | March 2004 |
| 3738 | Wave and Equation Based Rate Control (WEBRC) Building BlockM. Luby, V. Goyal | Experimental | April 2004 |
| 3758 | Stream Control Transmission Protocol (SCTP) Partial Reliability ExtensionR. Stewart, M. Ramalho, Q. Xie, M. Tuexen, P. Conrad | Proposed Standard | May 2004 |
| 3819 | Advice for Internet Subnetwork DesignersP. Karn, Ed., C. Bormann, G. Fairhurst, D. Grossman, R. Ludwig, J. Mahdavi, G. Montenegro, J. Touch, L. Wood | Best Current Practice | July 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 |
| 3851 | Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.1 Message SpecificationB. Ramsdell, Ed. · obsoleted by RFC 5751 | Proposed Standard | July 2004 |
| 3852 | Cryptographic Message Syntax (CMS)R. Housley · obsoleted by RFC 5652 | Proposed Standard | July 2004 |
| 4301 | Security Architecture for the Internet ProtocolS. Kent, K. Seo | Proposed Standard | December 2005 |
| 4302 | IP Authentication HeaderS. Kent | Proposed Standard | December 2005 |
| 4303 | IP Encapsulating Security Payload (ESP)S. Kent | Proposed Standard | December 2005 |
| 4306 | Internet Key Exchange (IKEv2) ProtocolC. Kaufman, Ed. · obsoleted by RFC 5996 | Proposed Standard | December 2005 |
| 4340 | Datagram Congestion Control Protocol (DCCP)E. Kohler, M. Handley, S. Floyd | Proposed Standard | March 2006 |
| 4341 | Profile for Datagram Congestion Control Protocol (DCCP) Congestion Control ID 2: TCP-like Congestion ControlS. Floyd, E. Kohler | 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 |
| 4347 | Datagram Transport Layer SecurityE. Rescorla, N. Modadugu · obsoleted by RFC 6347 | Historic | April 2006 |
| 4654 | TCP-Friendly Multicast Congestion Control (TFMCC): Protocol SpecificationJ. Widmer, M. Handley | Experimental | August 2006 |
| 4787 | Network Address Translation (NAT) Behavioral Requirements for Unicast UDPF. Audet, Ed., C. Jennings | Best Current Practice | January 2007 |
| 4821 | Packetization Layer Path MTU DiscoveryM. Mathis, J. Heffner | Proposed Standard | March 2007 |
| 4880 | OpenPGP Message FormatJ. Callas, L. Donnerhacke, H. Finney, D. Shaw, R. Thayer · obsoleted by RFC 9580 | Proposed Standard | November 2007 |
| 4960 | Stream Control Transmission ProtocolR. Stewart, Ed. · obsoleted by RFC 9260 | Proposed Standard | September 2007 |
| 4963 | IPv4 Reassembly Errors at High Data RatesJ. Heffner, M. Mathis, B. Chandler | Informational | July 2007 |
| 4987 | TCP SYN Flooding Attacks and Common MitigationsW. Eddy | Informational | August 2007 |
| 5082 | The Generalized TTL Security Mechanism (GTSM)V. Gill, J. Heasley, D. Meyer, P. Savola, Ed., C. Pignataro | Proposed Standard | October 2007 |
| 5348 | TCP Friendly Rate Control (TFRC): Protocol SpecificationS. Floyd, M. Handley, J. Padhye, J. Widmer | Proposed Standard | September 2008 |