Port 50 — re-mail-ck

Well-known port 50 (tcp/udp): Remote Mail Checking Protocol. Service name: re-mail-ck.

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

registry record

value: 50

Service Name	re-mail-ck
Port Number	50
Transport Protocol	tcp
Description	Remote Mail Checking Protocol
Assignee	[Steve_Dorner]
Contact	[Steve_Dorner]
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/50 or /port/50.json