RFC 604 · UNKNOWN · 1973
MON · 27 JUL 2026
Assigned link numbers
Overview
RFC 604, “Assigned link numbers”, is an Unknown document published in December 1973 by J. Postel. It obsoletes RFC 317. It has been obsoleted by RFC 739 — refer to the newer document for the authoritative version. The canonical text is published by the RFC Editor.
Abstract
Modifies official host-host protocol. Replaces RFC 377.
What “Unknown” means
The standards-track status of this early RFC was never formally classified.
Read this RFC
The canonical text of RFC 604 is hosted at rfc-editor.org. Available in TXT,HTML.
Relationships to other RFCs
Other RFCs from 1973
- RFC 603 Response to RFC 597: Host status
- RFC 602 "The stockings were hung by the chimney with care"
- RFC 606 Host names on-line
- RFC 601 Traffic statistics
- RFC 600 Interfacing an Illinois plasma terminal to the ARPANET
- RFC 599 Update on NETRJS
- RFC 598 RFC index - December 5, 1973
- RFC 610 Further datalanguage design concepts