RFC 256 · UNKNOWN · 1971
SUN · 14 JUN 2026
IMPSYS change notification
Overview
RFC 256, “IMPSYS change notification”, is an Unknown document published in November 1971 by B. Cosell. 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 256 is hosted at rfc-editor.org. Available in TXT,HTML.
Other RFCs from 1971
- RFC 255 Status of network hosts
- RFC 254 Scenarios for using ARPANET computers
- RFC 253 Second Network Graphics meeting details
- RFC 252 Network host status
- RFC 251 Weather data
- RFC 250 Some thoughts on file transfer
- RFC 263 "Very Distant" Host interface
- RFC 249 Coordination of equipment and supplies purchase