Port 1 — tcpmux

Well-known port 1 (tcp/udp): TCP Port Service Multiplexer. Service name: tcpmux.

port kind port status standard verification verified tier A iana-registry-row@1

registry record

value: 1

Service Name	tcpmux
Port Number	1
Transport Protocol	tcp
Description	TCP Port Service Multiplexer
Assignee	[Mark_Lottor]
Contact	[Mark_Lottor]
Registration Date
Modification Date
Reference
Service Code
Unauthorized Use Reported
Assignment Notes

source: https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.csv
version: IANA registry, Last-Modified: Fri, 29 May 2026 01:11:28 GMT
retrieved: 2026-05-29 · updated: 2026-05-29

agent: curl -H 'accept: application/json' wire.phall.io/port/1 or /port/1.json