# WHATPORT(50300)

## NAME

port 50300 — Unassigned (dynamic range) — No registration, no known service — a rarely-seen port in the private range.

Protocol: TCP  
IANA registry

## DESCRIPTION

50300 falls above 49151, so it is Dynamic/Private space that RFC 6335 forbids IANA from assigning. Nmap's service database lists it as unknown for both TCP and UDP with a very low frequency, meaning it is genuinely uncommon on internet-wide scans rather than merely unnamed. If you see it open, it belongs to something local and specific, and only the host's process table will tell you what.

## EXPOSURE

**Expose with care.** Nothing standard lives here, so there is no baseline to compare against; identify the owning process before making any allow decision.

## CHECK

```sh
sudo lsof -nP -iTCP:50300 -sTCP:LISTEN
```

## 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/50300/> · JSON: <https://whatport.net/50300.json> · full dataset: <https://whatport.net/ports.json>