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 265–288 of 686 documents

Document	Version
Port 414 (infoseek) Port 414 is an IANA System Port assigned to infoseek (InfoSeek) over TCP and UDP.	v1
Port 415 (bnet) Port 415 is an IANA System Port assigned to bnet (BNet) over TCP and UDP.	v1
Port 416 (silverplatter) Port 416 is an IANA System Port assigned to silverplatter (Silverplatter) over TCP and UDP.	v1
Port 417 (onmux) Port 417 is an IANA System Port assigned to onmux (Onmux) over TCP and UDP.	v1
Port 418 (hyper-g) Port 418 is an IANA System Port assigned to hyper-g (Hyper-G) over TCP and UDP.	v1
Port 419 (ariel1) Port 419 is an IANA System Port assigned to ariel1 (Ariel 1) over TCP and UDP.	v1
Port 42 (name, nameserver) Port 42 is an IANA System Port assigned to name and nameserver over TCP and UDP.	v1
Port 420 (smpte) Port 420 is an IANA System Port assigned to smpte (SMPTE) over TCP and UDP.	v1
Port 421 (ariel2) Port 421 is an IANA System Port assigned to ariel2 (Ariel 2) over TCP and UDP.	v1
Port 422 (ariel3) Port 422 is an IANA System Port assigned to ariel3 (Ariel 3) over TCP and UDP.	v1
Port 423 (opc-job-start) Port 423 is an IANA System Port assigned to opc-job-start (IBM Operations Planning and Control Start) over TCP and UDP.	v1
Port 424 (opc-job-track) Port 424 is an IANA System Port assigned to opc-job-track (IBM Operations Planning and Control Track) over TCP and UDP.	v1
Port 425 (icad-el) Port 425 is an IANA System Port assigned to icad-el (ICAD) over TCP and UDP.	v1
Port 426 (smartsdp) Port 426 is an IANA System Port assigned to smartsdp (smartsdp) over TCP and UDP.	v1
Port 427 (svrloc) Port 427 is an IANA System Port assigned to svrloc (Server Location) over TCP and UDP.	v1
Port 428 (ocs-cmu, ocs_cmu) Port 428 is an IANA System Port assigned to ocs-cmu and ocs_cmu over TCP and UDP.	v1
Port 429 (ocs-amu, ocs_amu) Port 429 is an IANA System Port assigned to ocs-amu and ocs_amu over TCP and UDP.	v1
Port 43 (nicname) Port 43 is an IANA System Port assigned to nicname (Who Is) over TCP and UDP.	v1
Port 430 (utmpsd) Port 430 is an IANA System Port assigned to utmpsd (UTMPSD) over TCP and UDP.	v1
Port 431 (utmpcd) Port 431 is an IANA System Port assigned to utmpcd (UTMPCD) over TCP and UDP.	v1
Port 432 (iasd) Port 432 is an IANA System Port assigned to iasd (IASD) over TCP and UDP.	v1
Port 433 (nnsp) Port 433 is an IANA System Port assigned to nnsp (NNTP for transit servers (NNSP)) over TCP and UDP.	v1
Port 434 (mobileip-agent) Port 434 is an IANA System Port assigned to mobileip-agent (MobileIP-Agent) over TCP and UDP.	v1
Port 435 (mobilip-mn) Port 435 is an IANA System Port assigned to mobilip-mn (MobilIP-MN) 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