| 768 | User Datagram ProtocolJ. Postel | Internet Standard | August 1980 |
| 792 | Internet Control Message ProtocolJ. Postel | Internet Standard | September 1981 |
| 793 | Transmission Control ProtocolJ. Postel · obsoleted by RFC 9293 | Internet Standard | September 1981 |
| 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 |
| 2404 | The Use of HMAC-SHA-1-96 within ESP and AHC. Madson, R. Glenn | Proposed Standard | November 1998 |
| 2410 | The NULL Encryption Algorithm and Its Use With IPsecR. Glenn, S. Kent | Proposed Standard | November 1998 |
| 2460 | Internet Protocol, Version 6 (IPv6) SpecificationS. Deering, R. Hinden · obsoleted by RFC 8200 | Draft Standard | December 1998 |
| 2536 | DSA KEYs and SIGs in the Domain Name System (DNS)D. Eastlake 3rd | Proposed Standard | March 1999 |
| 2785 | Methods for Avoiding the "Small-Subgroup" Attacks on the Diffie-Hellman Key Agreement Method for S/MIMER. Zuccherato | Informational | March 2000 |
| 2898 | PKCS #5: Password-Based Cryptography Specification Version 2.0B. Kaliski · obsoleted by RFC 8018 | Informational | September 2000 |
| 3110 | RSA/SHA-1 SIGs and RSA KEYs in the Domain Name System (DNS)D. Eastlake 3rd | Proposed Standard | May 2001 |
| 3447 | Public-Key Cryptography Standards (PKCS) #1: RSA Cryptography Specifications Version 2.1J. Jonsson, B. Kaliski · obsoleted by RFC 8017 | Informational | February 2003 |
| 3526 | More Modular Exponential (MODP) Diffie-Hellman groups for Internet Key Exchange (IKE)T. Kivinen, M. Kojo | Proposed Standard | May 2003 |
| 3602 | The AES-CBC Cipher Algorithm and Its Use with IPsecS. Frankel, R. Glenn, S. Kelly | Proposed Standard | September 2003 |
| 3849 | IPv6 Address Prefix Reserved for DocumentationG. Huston, A. Lord, P. Smith | Informational | July 2004 |
| 3972 | Cryptographically Generated Addresses (CGA)T. Aura | 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 |
| 4282 | The Network Access IdentifierB. Aboba, M. Beadles, J. Arkko, P. Eronen · obsoleted by RFC 7542 | Proposed Standard | December 2005 |
| 4443 | Internet Control Message Protocol (ICMPv6) for the Internet Protocol Version 6 (IPv6) SpecificationA. Conta, S. Deering, M. Gupta, Ed. | Internet Standard | March 2006 |
| 4754 | IKE and IKEv2 Authentication Using the Elliptic Curve Digital Signature Algorithm (ECDSA)D. Fu, J. Solinas | Proposed Standard | January 2007 |
| 4868 | Using HMAC-SHA-256, HMAC-SHA-384, and HMAC-SHA-512 with IPsecS. Kelly, S. Frankel | Proposed Standard | May 2007 |
| 5201 | Host Identity ProtocolR. Moskowitz, P. Nikander, P. Jokela, Ed., T. Henderson · obsoleted by RFC 7401 | Experimental | April 2008 |
| 5226 | Guidelines for Writing an IANA Considerations Section in RFCsT. Narten, H. Alvestrand · obsoleted by RFC 8126 | Best Current Practice | May 2008 |
| 5338 | Using the Host Identity Protocol with Legacy ApplicationsT. Henderson, P. Nikander, M. Komu | Experimental | September 2008 |
| 5533 | Shim6: Level 3 Multihoming Shim Protocol for IPv6E. Nordmark, M. Bagnulo | Proposed Standard | June 2009 |
| 5702 | Use of SHA-2 Algorithms with RSA in DNSKEY and RRSIG Resource Records for DNSSECJ. Jansen | Proposed Standard | October 2009 |
| 5737 | IPv4 Address Blocks Reserved for DocumentationJ. Arkko, M. Cotton, L. Vegoda | Informational | January 2010 |
| 5741 | RFC Streams, Headers, and BoilerplatesL. Daigle, Ed., O. Kolkman, Ed., IAB · obsoleted by RFC 7841 | Informational | December 2009 |
| 5869 | HMAC-based Extract-and-Expand Key Derivation Function (HKDF)H. Krawczyk, P. Eronen | Informational | May 2010 |
| 5903 | Elliptic Curve Groups modulo a Prime (ECP Groups) for IKE and IKEv2D. Fu, J. Solinas | Informational | June 2010 |
| 6090 | Fundamental Elliptic Curve Cryptography AlgorithmsD. McGrew, K. Igoe, M. Salter | Informational | February 2011 |
| 6253 | Host Identity Protocol CertificatesT. Heer, S. Varjonen · obsoleted by RFC 8002 | Experimental | May 2011 |
| 6724 | Default Address Selection for Internet Protocol Version 6 (IPv6)D. Thaler, Ed., R. Draves, A. Matsumoto, T. Chown | Proposed Standard | September 2012 |
| 7045 | Transmission and Processing of IPv6 Extension HeadersB. Carpenter, S. Jiang | Proposed Standard | December 2013 |
| 7296 | Internet Key Exchange Protocol Version 2 (IKEv2)C. Kaufman, P. Hoffman, Y. Nir, P. Eronen, T. Kivinen | Internet Standard | October 2014 |
| 7343 | An IPv6 Prefix for Overlay Routable Cryptographic Hash Identifiers Version 2 (ORCHIDv2)J. Laganier, F. Dupont | Proposed Standard | September 2014 |
| 7402 | Using the Encapsulating Security Payload (ESP) Transport Format with the Host Identity Protocol (HIP)P. Jokela, R. Moskowitz, J. Melen | Proposed Standard | April 2015 |