# WHATPORT(726)

## NAME

port 726 — Unassigned — No IANA registration and no documented service — a blank number.

Protocol: TCP  
IANA registry

## DESCRIPTION

726 is absent from the IANA registry and listed as "unknown" in Nmap's service database, with one of the lowest observed open-port frequencies in this range. No published protocol, product default, or documented malware uses it. If it is open, it belongs to something configured locally on that host.

## EXPOSURE

**Expose with care.** Nothing about the port number justifies exposing it; determine the service first.

## CHECK

```sh
nmap -sV -p 726 TARGET
```

## SEE ALSO

- 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/726/> · JSON: <https://whatport.net/726.json> · full dataset: <https://whatport.net/ports.json>