# WHATPORT(6839)

## NAME

port 6839 — Unassigned — Unassigned at IANA, inside the 6832-6840 free block.

Protocol: TCP  
IANA registry

## DESCRIPTION

IANA lists 6832-6840 as Unassigned, so 6839 has no registered service on TCP or UDP, and nmap's table records it only as unknown. There is no standard software that defaults here and no notable malware association to report. Whatever is listening chose the number arbitrarily.

## EXPOSURE

**Expose with care.** No expected service means no expected exposure — find the process, then judge it.

## CHECK

```sh
sudo lsof -nP -iTCP:6839 -sTCP:LISTEN
```

## SEE ALSO

- iana — [IANA Service Name and Transport Protocol Port Number Registry — 6839](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=6839) (iana.org)

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HTML: <https://whatport.net/6839/> · JSON: <https://whatport.net/6839.json> · full dataset: <https://whatport.net/ports.json>