Port 143 — imap

Well-known port 143 (tcp/udp): Internet Message Access Protocol. Service name: imap. Referenced in RFC3501, RFC9051.

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

registry record

value: 143

Service Name	imap
Port Number	143
Transport Protocol	tcp
Description	Internet Message Access Protocol
Assignee	[IESG]
Contact	[IETF_Chair]
Registration Date
Modification Date	2021-02-22
Reference	[RFC3501][RFC9051]
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/143 or /port/143.json