| 1122 | Requirements for Internet Hosts - Communication LayersR. Braden, Ed. | Internet Standard | October 1989 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 3688 | The IETF XML RegistryM. Mealling | Best Current Practice | January 2004 |
| 3986 | Uniform Resource Identifier (URI): Generic SyntaxT. Berners-Lee, R. Fielding, L. Masinter | Internet Standard | January 2005 |
| 4034 | Resource Records for the DNS Security ExtensionsR. Arends, R. Austein, M. Larson, D. Massey, S. Rose | Proposed Standard | March 2005 |
| 4340 | Datagram Congestion Control Protocol (DCCP)E. Kohler, M. Handley, S. Floyd | Proposed Standard | March 2006 |
| 4632 | Classless Inter-domain Routing (CIDR): The Internet Address Assignment and Aggregation PlanV. Fuller, T. Li | Best Current Practice | August 2006 |
| 4960 | Stream Control Transmission ProtocolR. Stewart, Ed. · obsoleted by RFC 9260 | Proposed Standard | September 2007 |
| 5575 | Dissemination of Flow Specification RulesP. Marques, N. Sheth, R. Raszuk, B. Greene, J. Mauch, D. McPherson · obsoleted by RFC 8955 | Proposed Standard | August 2009 |
| 5925 | The TCP Authentication OptionJ. Touch, A. Mankin, R. Bonica | Proposed Standard | June 2010 |
| 6125 | Representation and Verification of Domain-Based Application Service Identity within Internet Public Key Infrastructure Using X.509 (PKIX) Certificates in the Context of Transport Layer Security (TLS)P. Saint-Andre, J. Hodges · obsoleted by RFC 9525 | Proposed Standard | March 2011 |
| 6241 | Network Configuration Protocol (NETCONF)R. Enns, Ed., M. Bjorklund, Ed., J. Schoenwaelder, Ed., A. Bierman, Ed. | Proposed Standard | June 2011 |
| 6242 | Using the NETCONF Protocol over Secure Shell (SSH)M. Wasserman | Proposed Standard | June 2011 |
| 6520 | Transport Layer Security (TLS) and Datagram Transport Layer Security (DTLS) Heartbeat ExtensionR. Seggelmann, M. Tuexen, M. Williams | Proposed Standard | February 2012 |
| 6991 | Common YANG Data TypesJ. Schoenwaelder, Ed. · obsoleted by RFC 9911 | Proposed Standard | July 2013 |
| 7230 | Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and RoutingR. Fielding, Ed., J. Reschke, Ed. · obsoleted by RFC 9110, RFC 9112 | Proposed Standard | June 2014 |
| 7525 | Recommendations for Secure Use of Transport Layer Security (TLS) and Datagram Transport Layer Security (DTLS)Y. Sheffer, R. Holz, P. Saint-Andre · obsoleted by RFC 9325 | Best Current Practice | May 2015 |
| 7841 | RFC Streams, Headers, and BoilerplatesJ. Halpern, Ed., L. Daigle, Ed., O. Kolkman, Ed. | Informational | May 2016 |
| 7858 | Specification for DNS over Transport Layer Security (TLS)Z. Hu, L. Zhu, J. Heidemann, A. Mankin, D. Wessels, P. Hoffman | Proposed Standard | May 2016 |
| 7950 | The YANG 1.1 Data Modeling LanguageM. Bjorklund, Ed. | Proposed Standard | August 2016 |
| 7951 | JSON Encoding of Data Modeled with YANGL. Lhotka | Proposed Standard | August 2016 |
| 8040 | RESTCONF ProtocolA. Bierman, M. Bjorklund, K. Watsen | Proposed Standard | January 2017 |
| 8174 | Ambiguity of Uppercase vs Lowercase in RFC 2119 Key WordsB. Leiba | Best Current Practice | May 2017 |
| 8259 | The JavaScript Object Notation (JSON) Data Interchange FormatT. Bray, Ed. | Internet Standard | December 2017 |
| 8340 | YANG Tree DiagramsM. Bjorklund, L. Berger, Ed. | Best Current Practice | March 2018 |
| 8341 | Network Configuration Access Control ModelA. Bierman, M. Bjorklund | Internet Standard | March 2018 |
| 8446 | The Transport Layer Security (TLS) Protocol Version 1.3E. Rescorla · obsoleted by RFC 9846 | Proposed Standard | August 2018 |
| 8484 | DNS Queries over HTTPS (DoH)P. Hoffman, P. McManus | Proposed Standard | October 2018 |
| 8499 | DNS TerminologyP. Hoffman, A. Sullivan, K. Fujiwara · obsoleted by RFC 9499 | Best Current Practice | January 2019 |
| 8519 | YANG Data Model for Network Access Control Lists (ACLs)M. Jethanandani, S. Agarwal, L. Huang, D. Blair | Proposed Standard | March 2019 |
| 8612 | DDoS Open Threat Signaling (DOTS) RequirementsA. Mortensen, T. Reddy, R. Moskowitz | Informational | May 2019 |
| 8782 | Distributed Denial-of-Service Open Threat Signaling (DOTS) Signal Channel SpecificationT. Reddy.K, Ed., M. Boucadair, Ed., P. Patil, A. Mortensen, N. Teague · obsoleted by RFC 9132 | Proposed Standard | May 2020 |