| RFC | Status | Reference | Notes |
|---|---|---|---|
| 9401 | Informational | S. Toyosawa (1 April 2023). The Addition of the Death (DTH) Flag to TCP. Independent Submission. doi:10.17487/RFC9401. ISSN 2070-1721. RFC 9401. | This is an April Fools' Day Request for Comments. |
| 9402 | Informational | M. Basaglia; J. Bernards; J. Maas (1 April 2023). Concat Notation. Independent Submission. doi:10.17487/RFC9402. ISSN 2070-1721. RFC 9402. | This is an April Fools' Day Request for Comments. |
| 9405 | Informational | C. GPT (1 April 2023). R. L. Barnes (ed.). AI Sarcasm Detection: Insult Your AI without Offending It. Independent Submission. doi:10.17487/RFC9405. ISSN 2070-1721. RFC 9405. | This is an April Fools' Day Request for Comments. |
| 9419 | Informational | J. Arkko; T. Hardie; T. Pauly; M. Kühlewind (July 2023). Considerations on Application - Network Collaboration Using Path Signals. Internet Architecture Board (IAB). doi:10.17487/RFC9419. RFC 9419. |
