| 791 | Internet ProtocolJ. Postel | Internet Standard | September 1981 |
| 792 | Internet Control Message ProtocolJ. Postel | Internet Standard | September 1981 |
| 822 | STANDARD FOR THE FORMAT OF ARPA INTERNET TEXT MESSAGESD. Crocker · obsoleted by RFC 2822 | Internet Standard | August 1982 |
| 1191 | Path MTU discoveryJ. Mogul, S. Deering | Draft Standard | November 1990 |
| 1704 | On Internet AuthenticationN. Haller, R. Atkinson | Informational | October 1994 |
| 2003 | IP Encapsulation within IPC. Perkins | Proposed Standard | October 1996 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2253 | Lightweight Directory Access Protocol (v3): UTF-8 String Representation of Distinguished NamesM. Wahl, S. Kille, T. Howes · obsoleted by RFC 4510, RFC 4514 | Proposed Standard | December 1997 |
| 2401 | Security Architecture for the Internet ProtocolS. Kent, R. Atkinson · obsoleted by RFC 4301 | Proposed Standard | November 1998 |
| 2409 | The Internet Key Exchange (IKE)D. Harkins, D. Carrel · obsoleted by RFC 4306 | Historic | November 1998 |
| 2460 | Internet Protocol, Version 6 (IPv6) SpecificationS. Deering, R. Hinden · obsoleted by RFC 8200 | Draft Standard | December 1998 |
| 2463 | Internet Control Message Protocol (ICMPv6) for the Internet Protocol Version 6 (IPv6) SpecificationA. Conta, S. Deering · obsoleted by RFC 4443 | Draft Standard | December 1998 |
| 2474 | Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 HeadersK. Nichols, S. Blake, F. Baker, D. Black | Proposed Standard | December 1998 |
| 2475 | An Architecture for Differentiated ServicesS. Blake, D. Black, M. Carlson, E. Davies, Z. Wang, W. Weiss | Informational | December 1998 |
| 2828 | Internet Security GlossaryR. Shirey · obsoleted by RFC 4949 | Informational | May 2000 |
| 2983 | Differentiated Services and TunnelsD. Black | Informational | October 2000 |
| 3168 | The Addition of Explicit Congestion Notification (ECN) to IPK. Ramakrishnan, S. Floyd, D. Black | Proposed Standard | September 2001 |
| 3173 | IP Payload Compression Protocol (IPComp)A. Shacham, B. Monsour, R. Pereira, M. Thomas | Proposed Standard | September 2001 |
| 3260 | New Terminology and Clarifications for DiffservD. Grossman | Informational | April 2002 |
| 3280 | Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) ProfileR. Housley, W. Polk, W. Ford, D. Solo · obsoleted by RFC 5280 | Proposed Standard | May 2002 |
| 3547 | The Group Domain of InterpretationM. Baugher, B. Weis, T. Hardjono, H. Harney · obsoleted by RFC 6407 | Proposed Standard | July 2003 |
| 3697 | IPv6 Flow Label SpecificationJ. Rajahalme, A. Conta, B. Carpenter, S. Deering · obsoleted by RFC 6437 | Proposed Standard | March 2004 |
| 3740 | The Multicast Group Security ArchitectureT. Hardjono, B. Weis | Informational | March 2004 |
| 3775 | Mobility Support in IPv6D. Johnson, C. Perkins, J. Arkko · obsoleted by RFC 6275 | Proposed Standard | June 2004 |
| 3884 | Use of IPsec Transport Mode for Dynamic RoutingJ. Touch, L. Eggert, Y. Wang | Informational | September 2004 |
| 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 |
| 4307 | Cryptographic Algorithms for Use in the Internet Key Exchange Version 2 (IKEv2)J. Schiller · obsoleted by RFC 8247 | Proposed Standard | December 2005 |