# WHATPORT(19101)

## NAME

port 19101 — Unassigned — No registration and no documented service; the 19090-19110 range is empty at IANA.

Protocol: TCP  
IANA registry

## DESCRIPTION

IANA assigns nothing between 19090 and 19110, 19101 included, and Nmap records the port as unknown while still scanning it by default on frequency grounds. Applications sometimes number an internal service 19101 as part of a self-chosen block, but there is no convention to point at. An open 19101 is an unattributed service.

## EXPOSURE

**Expose with care.** Nothing about the number justifies exposure. Find the owning process and judge that.

## CHECK

```sh
sudo lsof -nP -iTCP:19101 -sTCP:LISTEN
```

## 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)
- source — [Nmap services frequency database](https://github.com/nmap/nmap/blob/master/nmap-services) (github.com)

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HTML: <https://whatport.net/19101/> · JSON: <https://whatport.net/19101.json> · full dataset: <https://whatport.net/ports.json>