RFC 866 · INTERNET STANDARD · 1983
MON · 15 JUN 2026
Active users
Overview
RFC 866, “Active users”, is an Internet Standard document published in May 1983 by J. Postel. The canonical text is published by the RFC Editor.
Abstract
This RFC specifies a standard for the ARPA Internet community. Hosts on the ARPA Internet that choose to implement an Active Users Protocol are expected to adopt and implement this standard. The Active Users service simply sends a list of the currently active users on the host without regard to the input.
What “Internet Standard” means
A mature, widely-implemented specification that has completed the full IETF standards process — the highest maturity level on the standards track.
Read this RFC
The canonical text of RFC 866 is hosted at rfc-editor.org. Available in TXT,HTML.
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