Well-known ports (IANA registry)

IANA System Ports (0–1023) from the IANA Service Name and Transport Protocol Port Number Registry, one document per port with an assigned service name. Each lists the registered service names, transport protocols, descriptions, and references as IANA records them.

Browse 686 documents Use with your agent

Documents

Showing 73–96 of 686 documents

Document	Version
Port 166 (s-net) Port 166 is an IANA System Port assigned to s-net (Sirius Systems) over TCP and UDP.	v1
Port 167 (namp) Port 167 is an IANA System Port assigned to namp (NAMP) over TCP and UDP.	v1
Port 168 (rsvd) Port 168 is an IANA System Port assigned to rsvd (RSVD) over TCP and UDP.	v1
Port 169 (send) Port 169 is an IANA System Port assigned to send (SEND) over TCP and UDP.	v1
Port 17 (qotd) Port 17 is an IANA System Port assigned to qotd (Quote of the Day) over TCP and UDP.	v1
Port 170 (print-srv) Port 170 is an IANA System Port assigned to print-srv (Network PostScript) over TCP and UDP.	v1
Port 171 (multiplex) Port 171 is an IANA System Port assigned to multiplex (Network Innovations Multiplex) over TCP and UDP.	v1
Port 172 (cl-1, cl/1) Port 172 is an IANA System Port assigned to cl-1 and cl/1 over TCP and UDP.	v1
Port 173 (xyplex-mux) Port 173 is an IANA System Port assigned to xyplex-mux (Xyplex) over TCP and UDP.	v1
Port 174 (mailq) Port 174 is an IANA System Port assigned to mailq (MAILQ) over TCP and UDP.	v1
Port 175 (vmnet) Port 175 is an IANA System Port assigned to vmnet (VMNET) over TCP and UDP.	v1
Port 176 (genrad-mux) Port 176 is an IANA System Port assigned to genrad-mux (GENRAD-MUX) over TCP and UDP.	v1
Port 177 (xdmcp) Port 177 is an IANA System Port assigned to xdmcp (X Display Manager Control Protocol) over TCP and UDP.	v1
Port 178 (nextstep) Port 178 is an IANA System Port assigned to nextstep (NextStep Window Server) over TCP and UDP.	v1
Port 179 (bgp) Port 179 is an IANA System Port assigned to bgp over TCP, UDP, and SCTP.	v1
Port 18 (msp) Port 18 is an IANA System Port assigned to msp (Message Send Protocol (historic)) over TCP and UDP.	v1
Port 180 (ris) Port 180 is an IANA System Port assigned to ris (Intergraph) over TCP and UDP.	v1
Port 181 (unify) Port 181 is an IANA System Port assigned to unify (Unify) over TCP and UDP.	v1
Port 182 (audit) Port 182 is an IANA System Port assigned to audit (Unisys Audit SITP) over TCP and UDP.	v1
Port 183 (ocbinder) Port 183 is an IANA System Port assigned to ocbinder (OCBinder) over TCP and UDP.	v1
Port 184 (ocserver) Port 184 is an IANA System Port assigned to ocserver (OCServer) over TCP and UDP.	v1
Port 185 (remote-kis) Port 185 is an IANA System Port assigned to remote-kis (Remote-KIS) over TCP and UDP.	v1
Port 186 (kis) Port 186 is an IANA System Port assigned to kis (KIS Protocol) over TCP and UDP.	v1
Port 187 (aci) Port 187 is an IANA System Port assigned to aci (Application Communication Interface) over TCP and UDP.	v1

Source, review, and usage

Published on Koskamo by: Koskamo
Version: 687
Documents: 686 documents
Reviewed: 2026-10-04
Last approved change: 2026-10-04
Agent lookups: 2 in the last 90 days
Reuse: IANA Service Name and Transport Protocol Port Number Registry (iana.org/assignments/service-names-port-numbers), system ports 0-1023; registry data reproduced verbatim with references
Review status: Published by Koskamo; proposed revisions require Koskamo approval

Original sources are linked on each document. Owner approval records a publishing decision; it does not imply independent fact checking.

Use this dataset from an agent

Agents can query it without an account. POST to /api/v1/retrieve, or connect an MCP client and call koskamo_retrieve with dataset: "well-known-ports".

Set up your agent Read documents as JSON

The JSON endpoint returns document text and source links in pages. Use limit and offset to retrieve more records; total gives the dataset size.

retrieve request

curl --fail-with-body 'https://koskamo.com/api/v1/retrieve' -H 'Content-Type: application/json' --data-raw '{"query":"well-known-ports","dataset":"well-known-ports","top_k":3}'

Change history

Every change that reached this dataset. Proposals from contributors land only after Koskamo approves them.

Published by Koskamo2026-10-04
Port 1022 (exp2) · v1
Published by Koskamo2026-10-04
Port 1021 (exp1) · v1
Published by Koskamo2026-10-04
Port 1010 (surf) · v1
Published by Koskamo2026-10-04
Port 1001 (webpush) · v1
Published by Koskamo2026-10-04
Port 1000 (cadlock2) · v1
Published by Koskamo2026-10-04
Port 999 (garcon, applix, puprouter) · v1
Published by Koskamo2026-10-04
Port 998 (busboy, puparp) · v1
Published by Koskamo2026-10-04
Port 997 (maitrd) · v1
Published by Koskamo2026-10-04
Port 996 (vsinet) · v1
Published by Koskamo2026-10-04
Port 995 (pop3s) · v1