# WHATPORT(667)

## NAME

port 667 — disclose — Registered as "disclose" for campaign contribution disclosures; no public implementation exists.

Protocol: TCP  
IANA registry

## DESCRIPTION

IANA registers TCP and UDP 667 as "disclose", described as campaign contribution disclosures for SDR Technologies. It is one of the more specific and less used registrations in the system port range, with no published protocol specification and no software you can point at. Anything listening on 667 in practice is unrelated to the registration.

## EXPOSURE

**Do not expose.** Effectively an unused system port, so a listener is unaccounted-for software — investigate it rather than expose it.

## CHECK

```sh
nc -vz -w 3 TARGET 667
```

## SEE ALSO

- iana — [IANA Service Name and Transport Protocol Port Number Registry — 667](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=667) (iana.org)

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HTML: <https://whatport.net/667/> · JSON: <https://whatport.net/667.json> · full dataset: <https://whatport.net/ports.json>