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 145–168 of 686 documents

Document	Version
Port 248 (bhfhs) Port 248 is an IANA System Port assigned to bhfhs (bhfhs) over TCP and UDP.	v1
Port 25 (smtp) Port 25 is an IANA System Port assigned to smtp (Simple Mail Transfer) over TCP and UDP.	v1
Port 256 (rap) Port 256 is an IANA System Port assigned to rap (RAP) over TCP and UDP.	v1
Port 257 (set) Port 257 is an IANA System Port assigned to set (Secure Electronic Transaction) over TCP and UDP.	v1
Port 259 (esro-gen) Port 259 is an IANA System Port assigned to esro-gen (Efficient Short Remote Operations) over TCP and UDP.	v1
Port 260 (openport) Port 260 is an IANA System Port assigned to openport (Openport) over TCP and UDP.	v1
Port 261 (nsiiops) Port 261 is an IANA System Port assigned to nsiiops (IIOP Name Service over TLS/SSL) over TCP and UDP.	v1
Port 262 (arcisdms) Port 262 is an IANA System Port assigned to arcisdms (Arcisdms) over TCP and UDP.	v1
Port 263 (hdap) Port 263 is an IANA System Port assigned to hdap (HDAP) over TCP and UDP.	v1
Port 264 (bgmp) Port 264 is an IANA System Port assigned to bgmp (BGMP) over TCP and UDP.	v1
Port 265 (x-bone-ctl) Port 265 is an IANA System Port assigned to x-bone-ctl (X-Bone CTL) over TCP and UDP.	v1
Port 266 (sst) Port 266 is an IANA System Port assigned to sst (SCSI on ST) over TCP and UDP.	v1
Port 267 (td-service) Port 267 is an IANA System Port assigned to td-service (Tobit David Service Layer) over TCP and UDP.	v1
Port 268 (td-replica) Port 268 is an IANA System Port assigned to td-replica (Tobit David Replica) over TCP and UDP.	v1
Port 269 (manet) Port 269 is an IANA System Port assigned to manet (MANET Protocols) over TCP and UDP.	v1
Port 27 (nsw-fe) Port 27 is an IANA System Port assigned to nsw-fe (NSW User System FE) over TCP and UDP.	v1
Port 270 (gist) Port 270 is an IANA System Port assigned to gist (Q-mode encapsulation for GIST messages) over UDP.	v1
Port 271 (pt-tls) Port 271 is an IANA System Port assigned to pt-tls (IETF Network Endpoint Assessment (NEA) Posture Transport Protocol over TLS (PT-TLS)) over TCP.	v1
Port 280 (http-mgmt) Port 280 is an IANA System Port assigned to http-mgmt (http-mgmt) over TCP and UDP.	v1
Port 281 (personal-link) Port 281 is an IANA System Port assigned to personal-link (Personal Link) over TCP and UDP.	v1
Port 282 (cableport-ax) Port 282 is an IANA System Port assigned to cableport-ax (Cable Port A/X) over TCP and UDP.	v1
Port 283 (rescap) Port 283 is an IANA System Port assigned to rescap (rescap) over TCP and UDP.	v1
Port 284 (corerjd) Port 284 is an IANA System Port assigned to corerjd (corerjd) over TCP and UDP.	v1
Port 286 (fxp) Port 286 is an IANA System Port assigned to fxp (FXP Communication) 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