# WHATPORT(50001)

## NAME

port 50001 — Unassigned (dynamic range) — No assignment and no standard service; in practice the second port in a 50000-based block.

Protocol: TCP  
IANA registry

## DESCRIPTION

50001 has no IANA registration — the registry ends at 49151 and RFC 6335 closes everything above to assignment — and Nmap's service database lists it as unknown. Where it does appear, it is usually the next number after a deliberately chosen 50000: a second Db2 instance, a second application listener, or a container publishing a small block of ports. Nothing about the number implies a protocol.

## EXPOSURE

**Expose with care.** Identify the service first. If it turns out to be a database or admin listener next to a 50000 sibling, treat it as never.

## CHECK

```sh
nmap -Pn -sV -p 50000-50001 TARGET
```

## SEE ALSO

- spec — [RFC 6335 — IANA Procedures for Service Name and Transport Protocol Port Number Registry](https://www.rfc-editor.org/rfc/rfc6335.html) (rfc-editor.org)
- 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/50001/> · JSON: <https://whatport.net/50001.json> · full dataset: <https://whatport.net/ports.json>