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 97–120 of 686 documents

Document	Version
Port 188 (mumps) Port 188 is an IANA System Port assigned to mumps (Plus Five's MUMPS) over TCP and UDP.	v1
Port 189 (qft) Port 189 is an IANA System Port assigned to qft (Queued File Transport) over TCP and UDP.	v1
Port 19 (chargen) Port 19 is an IANA System Port assigned to chargen (Character Generator) over TCP and UDP.	v1
Port 190 (gacp) Port 190 is an IANA System Port assigned to gacp (Gateway Access Control Protocol) over TCP and UDP.	v1
Port 191 (prospero) Port 191 is an IANA System Port assigned to prospero (Prospero Directory Service) over TCP and UDP.	v1
Port 192 (osu-nms) Port 192 is an IANA System Port assigned to osu-nms (OSU Network Monitoring System) over TCP and UDP.	v1
Port 193 (srmp) Port 193 is an IANA System Port assigned to srmp (Spider Remote Monitoring Protocol) over TCP and UDP.	v1
Port 194 (irc) Port 194 is an IANA System Port assigned to irc (Internet Relay Chat Protocol) over TCP and UDP.	v1
Port 195 (dn6-nlm-aud) Port 195 is an IANA System Port assigned to dn6-nlm-aud (DNSIX Network Level Module Audit) over TCP and UDP.	v1
Port 196 (dn6-smm-red) Port 196 is an IANA System Port assigned to dn6-smm-red (DNSIX Session Mgt Module Audit Redir) over TCP and UDP.	v1
Port 197 (dls) Port 197 is an IANA System Port assigned to dls (Directory Location Service) over TCP and UDP.	v1
Port 198 (dls-mon) Port 198 is an IANA System Port assigned to dls-mon (Directory Location Service Monitor) over TCP and UDP.	v1
Port 199 (smux) Port 199 is an IANA System Port assigned to smux (SMUX) over TCP and UDP.	v1
Port 20 (ftp-data) Port 20 is an IANA System Port assigned to ftp-data over TCP, UDP, and SCTP.	v1
Port 200 (src) Port 200 is an IANA System Port assigned to src (IBM System Resource Controller) over TCP and UDP.	v1
Port 201 (at-rtmp) Port 201 is an IANA System Port assigned to at-rtmp (AppleTalk Routing Maintenance) over TCP and UDP.	v1
Port 202 (at-nbp) Port 202 is an IANA System Port assigned to at-nbp (AppleTalk Name Binding) over TCP and UDP.	v1
Port 203 (at-3) Port 203 is an IANA System Port assigned to at-3 (AppleTalk Unused) over TCP and UDP.	v1
Port 204 (at-echo) Port 204 is an IANA System Port assigned to at-echo (AppleTalk Echo) over TCP and UDP.	v1
Port 205 (at-5) Port 205 is an IANA System Port assigned to at-5 (AppleTalk Unused) over TCP and UDP.	v1
Port 206 (at-zis) Port 206 is an IANA System Port assigned to at-zis (AppleTalk Zone Information) over TCP and UDP.	v1
Port 207 (at-7) Port 207 is an IANA System Port assigned to at-7 (AppleTalk Unused) over TCP and UDP.	v1
Port 208 (at-8) Port 208 is an IANA System Port assigned to at-8 (AppleTalk Unused) over TCP and UDP.	v1
Port 209 (qmtp) Port 209 is an IANA System Port assigned to qmtp (The Quick Mail Transfer Protocol) 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