# WHATPORT(9643)

## NAME

port 9643 — Unassigned — Unassigned at IANA with no established occupant — identify it locally, not from a port list.

Protocol: TCP  
IANA registry

## DESCRIPTION

There is no IANA service registration for 9643, and Nmap's frequency data puts it among the rarely-observed ports. No widely deployed product uses it as a default and there is no notable published malware association. Anything found here is application-specific.

## EXPOSURE

**Expose with care.** With no known protocol there is nothing to vouch for. Determine what answers before allowing it through a firewall.

## CHECK

```sh
sudo lsof -nP -iTCP:9643 -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/9643/> · JSON: <https://whatport.net/9643.json> · full dataset: <https://whatport.net/ports.json>