| 1035 | Domain names - implementation and specificationP. Mockapetris | Internet Standard | November 1987 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2181 | Clarifications to the DNS SpecificationR. Elz, R. Bush | Proposed Standard | July 1997 |
| 3629 | UTF-8, a transformation format of ISO 10646F. Yergeau | Internet Standard | November 2003 |
| 3912 | WHOIS Protocol SpecificationL. Daigle | Draft Standard | September 2004 |
| 3966 | The tel URI for Telephone NumbersH. Schulzrinne | Proposed Standard | December 2004 |
| 3986 | Uniform Resource Identifier (URI): Generic SyntaxT. Berners-Lee, R. Fielding, L. Masinter | Internet Standard | January 2005 |
| 3987 | Internationalized Resource Identifiers (IRIs)M. Duerst, M. Suignard | Proposed Standard | January 2005 |
| 4592 | The Role of Wildcards in the Domain Name SystemE. Lewis | Proposed Standard | July 2006 |
| 4648 | The Base16, Base32, and Base64 Data EncodingsS. Josefsson | Proposed Standard | October 2006 |
| 5198 | Unicode Format for Network InterchangeJ. Klensin, M. Padlipsky | Proposed Standard | March 2008 |
| 5234 | Augmented BNF for Syntax Specifications: ABNFD. Crocker, Ed., P. Overell | Internet Standard | January 2008 |
| 5730 | Extensible Provisioning Protocol (EPP)S. Hollenbeck | Internet Standard | August 2009 |
| 5731 | Extensible Provisioning Protocol (EPP) Domain Name MappingS. Hollenbeck | Internet Standard | August 2009 |
| 5732 | Extensible Provisioning Protocol (EPP) Host MappingS. Hollenbeck | Internet Standard | August 2009 |
| 5733 | Extensible Provisioning Protocol (EPP) Contact MappingS. Hollenbeck | Internet Standard | August 2009 |
| 5734 | Extensible Provisioning Protocol (EPP) Transport over TCPS. Hollenbeck | Internet Standard | August 2009 |
| 5890 | Internationalized Domain Names for Applications (IDNA): Definitions and Document FrameworkJ. Klensin | Proposed Standard | August 2010 |
| 6068 | The 'mailto' URI SchemeM. Duerst, L. Masinter, J. Zawinski | Proposed Standard | October 2010 |
| 6530 | Overview and Framework for Internationalized EmailJ. Klensin, Y. Ko | Proposed Standard | February 2012 |
| 6672 | DNAME Redirection in the DNSS. Rose, W. Wijngaards | Proposed Standard | June 2012 |
| 6761 | Special-Use Domain NamesS. Cheshire, M. Krochmal | Proposed Standard | February 2013 |
| 7405 | Case-Sensitive String Support in ABNFP. Kyzivat | Proposed Standard | December 2014 |
| 7841 | RFC Streams, Headers, and BoilerplatesJ. Halpern, Ed., L. Daigle, Ed., O. Kolkman, Ed. | Informational | May 2016 |
| 8174 | Ambiguity of Uppercase vs Lowercase in RFC 2119 Key WordsB. Leiba | Best Current Practice | May 2017 |
| 8552 | Scoped Interpretation of DNS Resource Records through "Underscored" Naming of Attribute LeavesD. Crocker | Best Current Practice | March 2019 |
| 8553 | DNS Attrleaf Changes: Fixing Specifications That Use Underscored Node NamesD. Crocker | Best Current Practice | March 2019 |
| 9083 | JSON Responses for the Registration Data Access Protocol (RDAP)S. Hollenbeck, A. Newton | Internet Standard | June 2021 |
| 9110 | HTTP SemanticsR. Fielding, Ed., M. Nottingham, Ed., J. Reschke, Ed. | Internet Standard | June 2022 |
| 9499 | DNS TerminologyP. Hoffman, K. Fujiwara | Best Current Practice | March 2024 |
| 9839 | Unicode Character Repertoire SubsetsT. Bray, P. Hoffman | Proposed Standard | August 2025 |