# WHATPORT(3546)

## NAME

port 3546 — Unassigned — Unassigned in the IANA registry since 2002 — no service owns this number.

Protocol: TCP/UDP  
IANA registry

## DESCRIPTION

IANA's registry carries 3546 as an explicit Unassigned entry dated 2002-09. There is no registered service name, no specification, and no product that conventionally uses it. Nmap has no name for it and finds it open only rarely. Anything bound here is an application that picked an unclaimed port, so the port number carries no information about what you are talking to.

## EXPOSURE

**Expose with care.** Judge the actual service, not the number — an unassigned port often hides an ad-hoc admin tool or a container's published port that nobody meant to publish.

## CHECK

```sh
sudo lsof -nP -iTCP:3546 -sTCP:LISTEN
```

## SEE ALSO

- iana — [IANA port registry — 3546 (unassigned)](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=3546) (iana.org)

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HTML: <https://whatport.net/3546/> · JSON: <https://whatport.net/3546.json> · full dataset: <https://whatport.net/ports.json>