# WHATPORT(3580)

## NAME

port 3580 — NI Service Locator — National Instruments' port mapper — ask it for a service by name and it returns the port.

Protocol: TCP  
IANA registry

## DESCRIPTION

The NI Service Locator (nisvcloc) is installed with LabVIEW and other National Instruments software and listens on TCP 3580. It is a port mapper: NI services register themselves by name, and clients such as the NI Example Finder, LabVIEW Help, and the RT proxy query it to learn which dynamic port a named service is on. It accepts local and remote connections, and NI documents the port as fixed — you cannot move it. Expect it on engineering workstations, test racks, and CompactRIO controllers.

## EXPOSURE

**Do not expose.** A port mapper enumerates the other services on the host for anyone who asks, and it fronts lab and control hardware — keep it on the test network behind a firewall.

## CHECK

```sh
nc -vz -w 3 TARGET 3580
```

## SEE ALSO

- docs — [NI — Configuring Software and Hardware Firewalls to Support NI Products](https://www.ni.com/en/support/security/configuring-software-and-hardware-firewalls-to-support-national-.html) (ni.com)
- iana — [IANA port registry — 3580 (nati-svrloc)](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=3580) (iana.org)

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HTML: <https://whatport.net/3580/> · JSON: <https://whatport.net/3580.json> · full dataset: <https://whatport.net/ports.json>