# WHATPORT(16016)

## NAME

port 16016 — Unassigned — No registration, no known default service — an open 16016 identifies nothing on its own.

Protocol: TCP  
IANA registry

## DESCRIPTION

16016 is unassigned at IANA and unnamed in Nmap's services file, yet it sits inside Nmap's default top-1000 TCP ports because real-world scans see it open often enough to be worth a probe. No widely deployed product documents it as a default. A listener here is almost always an application or container that picked a memorable number.

## EXPOSURE

**Expose with care.** Judge it by what answers, not by the number. Run a version probe; an unknown service on a public interface deserves the same suspicion as any unexplained daemon.

## CHECK

```sh
nmap -Pn -sV -p 16016 TARGET
```

## 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/16016/> · JSON: <https://whatport.net/16016.json> · full dataset: <https://whatport.net/ports.json>