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 25–48 of 686 documents

Document	Version
Port 119 (nntp) Port 119 is an IANA System Port assigned to nntp (Network News Transfer Protocol) over TCP and UDP.	v1
Port 120 (cfdptkt) Port 120 is an IANA System Port assigned to cfdptkt (CFDPTKT) over TCP and UDP.	v1
Port 121 (erpc) Port 121 is an IANA System Port assigned to erpc (Encore Expedited Remote Pro.Call) over TCP and UDP.	v1
Port 122 (smakynet) Port 122 is an IANA System Port assigned to smakynet (SMAKYNET) over TCP and UDP.	v1
Port 123 (ntp) Port 123 is an IANA System Port assigned to ntp (Network Time Protocol) over TCP and UDP.	v1
Port 124 (ansatrader) Port 124 is an IANA System Port assigned to ansatrader (ANSA REX Trader) over TCP and UDP.	v1
Port 125 (locus-map) Port 125 is an IANA System Port assigned to locus-map (Locus PC-Interface Net Map Ser) over TCP and UDP.	v1
Port 126 (nxedit) Port 126 is an IANA System Port assigned to nxedit (NXEdit) over TCP and UDP.	v1
Port 127 (locus-con) Port 127 is an IANA System Port assigned to locus-con (Locus PC-Interface Conn Server) over TCP and UDP.	v1
Port 128 (gss-xlicen) Port 128 is an IANA System Port assigned to gss-xlicen (GSS X License Verification) over TCP and UDP.	v1
Port 129 (pwdgen) Port 129 is an IANA System Port assigned to pwdgen (Password Generator Protocol) over TCP and UDP.	v1
Port 13 (daytime) Port 13 is an IANA System Port assigned to daytime (Daytime) over TCP and UDP.	v1
Port 130 (cisco-fna) Port 130 is an IANA System Port assigned to cisco-fna (cisco FNATIVE) over TCP and UDP.	v1
Port 131 (cisco-tna) Port 131 is an IANA System Port assigned to cisco-tna (cisco TNATIVE) over TCP and UDP.	v1
Port 132 (cisco-sys) Port 132 is an IANA System Port assigned to cisco-sys (cisco SYSMAINT) over TCP and UDP.	v1
Port 133 (statsrv) Port 133 is an IANA System Port assigned to statsrv (Statistics Service) over TCP and UDP.	v1
Port 134 (ingres-net) Port 134 is an IANA System Port assigned to ingres-net (INGRES-NET Service) over TCP and UDP.	v1
Port 135 (epmap) Port 135 is an IANA System Port assigned to epmap (DCE endpoint resolution) over TCP and UDP.	v1
Port 136 (profile) Port 136 is an IANA System Port assigned to profile (PROFILE Naming System) over TCP and UDP.	v1
Port 137 (netbios-ns) Port 137 is an IANA System Port assigned to netbios-ns (NETBIOS Name Service) over TCP and UDP.	v1
Port 138 (netbios-dgm) Port 138 is an IANA System Port assigned to netbios-dgm (NETBIOS Datagram Service) over TCP and UDP.	v1
Port 139 (netbios-ssn) Port 139 is an IANA System Port assigned to netbios-ssn (NETBIOS Session Service) over TCP and UDP.	v1
Port 140 (emfis-data) Port 140 is an IANA System Port assigned to emfis-data (EMFIS Data Service) over TCP and UDP.	v1
Port 141 (emfis-cntl) Port 141 is an IANA System Port assigned to emfis-cntl (EMFIS Control Service) 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