RFC 3639 · INFORMATIONAL · 2003
MON · 14 SEP 2026
Considerations on the use of a Service Identifier in Packet Headers
Overview
RFC 3639, “Considerations on the use of a Service Identifier in Packet Headers”, is an Informational document published in October 2003 by M. St. Johns, G. Huston, IAB. The canonical text is published by the RFC Editor.
Abstract
This memo describes some considerations relating to the use of IP protocol number fields and payload protocol (e.g., TCP) port fields to identify particular services that may be associated with that port number or protocol number.
What “Informational” means
Published for the general information of the community. It does not define an IETF standard and carries no standards-track status.
Read this RFC
The canonical text of RFC 3639 is hosted at rfc-editor.org. Available in TXT,HTML.
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