RFC 421 · UNKNOWN · 1972
MON · 14 SEP 2026
Software Consulting Service for Network Users
Overview
RFC 421, “Software Consulting Service for Network Users”, is an Unknown document published in November 1972 by A.M. McKenzie. The canonical text is published by the RFC Editor.
What “Unknown” means
The standards-track status of this early RFC was never formally classified.
Read this RFC
The canonical text of RFC 421 is hosted at rfc-editor.org. Available in TXT,HTML.
Other RFCs from 1972
- RFC 422 Traffic statistics
- RFC 419 To: Network liaisons and station agents
- RFC 423 UCLA Campus Computing Network Liaison Staff for ARPANET
- RFC 418 Server File Transfer Under TSS/360 At NASA-Ames Research Center
- RFC 417 Link usage violation
- RFC 425 "But my NCP costs $500 a day"
- RFC 416 ARC System Will Be Unavailable for Use During Thanksgiving Week
- RFC 415 Tenex bandwidth