# WHATPORT(5440)

## NAME

port 5440 — Unassigned — Unassigned at IANA — no registered service, and nothing standard listens here.

Protocol: TCP  
IANA registry

## DESCRIPTION

The registry lists 5438-5442 as unassigned, so 5440 has no service name and no owner. Its neighbours are busy — 5432 is PostgreSQL, 5443 is registered to Pearson — but the port itself is claimed only by whatever application an operator points at it. Identify the process rather than reading anything into the number.

## EXPOSURE

**Expose with care.** No registration means no assumptions: an open 5440 is an application someone chose, and it should be reviewed on its own terms.

## CHECK

```sh
sudo lsof -nP -iTCP:5440 -sTCP:LISTEN
```

## SEE ALSO

- iana — [IANA port registry — 5440 (unassigned)](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=5440) (iana.org)

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HTML: <https://whatport.net/5440/> · JSON: <https://whatport.net/5440.json> · full dataset: <https://whatport.net/ports.json>