| 792 | Internet Control Message ProtocolJ. Postel | Internet Standard | September 1981 |
| 3007 | Secure Domain Name System (DNS) Dynamic UpdateB. Wellington | Proposed Standard | November 2000 |
| 3552 | Guidelines for Writing RFC Text on Security ConsiderationsE. Rescorla, B. Korver | Best Current Practice | July 2003 |
| 4033 | DNS Security Introduction and RequirementsR. Arends, R. Austein, M. Larson, D. Massey, S. Rose | Proposed Standard | March 2005 |
| 4034 | Resource Records for the DNS Security ExtensionsR. Arends, R. Austein, M. Larson, D. Massey, S. Rose | Proposed Standard | March 2005 |
| 4035 | Protocol Modifications for the DNS Security ExtensionsR. Arends, R. Austein, M. Larson, D. Massey, S. Rose | Proposed Standard | March 2005 |
| 4423 | Host Identity Protocol (HIP) ArchitectureR. Moskowitz, P. Nikander · obsoleted by RFC 9063 | Informational | May 2006 |
| 4443 | Internet Control Message Protocol (ICMPv6) for the Internet Protocol Version 6 (IPv6) SpecificationA. Conta, S. Deering, M. Gupta, Ed. | Internet Standard | March 2006 |
| 4861 | Neighbor Discovery for IP version 6 (IPv6)T. Narten, E. Nordmark, W. Simpson, H. Soliman | Draft Standard | September 2007 |
| 4960 | Stream Control Transmission ProtocolR. Stewart, Ed. · obsoleted by RFC 9260 | Proposed Standard | September 2007 |
| 5201 | Host Identity ProtocolR. Moskowitz, P. Nikander, P. Jokela, Ed., T. Henderson · obsoleted by RFC 7401 | Experimental | April 2008 |
| 5214 | Intra-Site Automatic Tunnel Addressing Protocol (ISATAP)F. Templin, T. Gleeson, D. Thaler | Informational | March 2008 |
| 5534 | Failure Detection and Locator Pair Exploration Protocol for IPv6 MultihomingJ. Arkko, I. van Beijnum | Proposed Standard | June 2009 |
| 5720 | Routing and Addressing in Networks with Global Enterprise Recursion (RANGER)F. Templin | Informational | February 2010 |
| 5741 | RFC Streams, Headers, and BoilerplatesL. Daigle, Ed., O. Kolkman, Ed., IAB · obsoleted by RFC 7841 | Informational | December 2009 |
| 5887 | Renumbering Still Needs WorkB. Carpenter, R. Atkinson, H. Flinck | Informational | May 2010 |
| 5902 | IAB Thoughts on IPv6 Network Address TranslationD. Thaler, L. Zhang, G. Lebovitz | Informational | July 2010 |