# WHATPORT(16018)

## NAME

port 16018 — Unassigned — Another unregistered number in Nmap's top-1000 list with no documented owner.

Protocol: TCP  
IANA registry

## DESCRIPTION

IANA has no assignment for 16018, and Nmap records it as unknown while still scanning it by default because of its observed open-port frequency. No mainstream software documents 16018 as a default listener. If you find it open, the only honest description is "an unidentified TCP service" until you fingerprint it.

## EXPOSURE

**Expose with care.** An unattributed listener is the finding. Trace it to a process locally rather than reasoning from the port number.

## CHECK

```sh
sudo lsof -nP -iTCP:16018 -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)
- source — [Nmap services frequency database](https://github.com/nmap/nmap/blob/master/nmap-services) (github.com)

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HTML: <https://whatport.net/16018/> · JSON: <https://whatport.net/16018.json> · full dataset: <https://whatport.net/ports.json>