# WHATPORT(1501)

## NAME

port 1501 — saiscm (Satellite-data Acquisition System 3) — A 1990s IANA registration for satellite telemetry acquisition; effectively nothing runs here today.

Protocol: TCP/UDP  
IANA registry

## DESCRIPTION

IANA assigns 1501 (TCP and UDP) to "saiscm", the Satellite-data Acquisition System 3, registered by Bill Taylor in the era when the registry was filled by individual vendors writing in. There is no public specification, no maintained implementation, and no commodity software that binds this port. If a scan shows 1501 open, the registration tells you nothing useful about what is actually listening.

## EXPOSURE

**Expose with care.** An open 1501 is an unidentified listener, not a known service — find the process that owns it before deciding anything, because the registry name is not evidence of what is running.

## CHECK

```sh
nc -vz -w 3 TARGET 1501
```

## SEE ALSO

- iana — [IANA Service Name and Transport Protocol Port Number Registry — 1501](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=1501) (iana.org)

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HTML: <https://whatport.net/1501/> · JSON: <https://whatport.net/1501.json> · full dataset: <https://whatport.net/ports.json>