| RFC | Status | Reference | Notes |
|---|---|---|---|
| 5513 | Informational | A. Farrel (1 April 2009). IANA Considerations for Three Letter Acronyms. Network Working Group. doi:10.17487/RFC5513. RFC 5513. | This is an April Fools' Day Request for Comments. |
| 5514 | Experimental | E. Vyncke (1 April 2009). IPv6 over Social Networks. Network Working Group. doi:10.17487/RFC5514. RFC 5514. | This is an April Fools' Day Request for Comments. |
| 5517 | Informational | S. HomChaudhuri; M. Foschiano (June 2009). Cisco Systems' Private VLANs: Scalable Security in a Multi-Client Environment. IETF. doi:10.17487/RFC5517. RFC 5517. | Independent Submission. |
| 5533 | Proposed Standard | E. Nordmark; M. Bagnulo (June 2009). Shim6: Level 3 Multihoming Shim Protocol for IPv6. Networking Working Group. doi:10.17487/RFC5533. RFC 5533. | |
| 5572 | Experimental | M. Blanchet; F. Parent (February 2010). IPv6 Tunnel Broker with the Tunnel Setup Protocol (TSP). doi:10.17487/RFC5572. ISSN 2070-1721. RFC 5572. |
