# WHATPORT(1271)

## NAME

port 1271 — eXcW — Registered as eXcW; a legacy assignment with no public documentation.

Protocol: TCP/UDP  
IANA registry

## DESCRIPTION

IANA lists 1271 on TCP and UDP as excw ("eXcW"), registered by Norm Freedman. No specification or current product documentation for the protocol is publicly available, and no widely documented software squats on the number. On a scan this is an unidentified listener whose identity has to come from the host, not from the registry.

## EXPOSURE

**Expose with care.** Unknown service; do not leave a listener you cannot identify reachable from untrusted networks.

## CHECK

```sh
sudo lsof -nP -iTCP:1271 -sTCP:LISTEN
```

## SEE ALSO

- iana — [IANA Service Name and Transport Protocol Port Number Registry](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml) (iana.org)

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HTML: <https://whatport.net/1271/> · JSON: <https://whatport.net/1271.json> · full dataset: <https://whatport.net/ports.json>