# WHATPORT(1580)

## NAME

port 1580 — tn-tl-r1 — An unexplained IANA registration — "tn-tl-r1" on TCP, "tn-tl-r2" on UDP, with no public protocol behind either.

Protocol: TCP  
IANA registry

## DESCRIPTION

IANA lists 1580/tcp as "tn-tl-r1" and 1580/udp as "tn-tl-r2", registered by Ed Kress. The registry gives no expansion of the name, there is no published specification, and no widely deployed software claims the port. This is one of the many mid-1990s vendor assignments that outlived the product that requested it.

## EXPOSURE

**Expose with care.** Nothing common listens here, so an open 1580 is an unidentified process — identify it locally before reasoning about whether it should be reachable.

## CHECK

```sh
nc -vz -w 3 TARGET 1580
```

## SEE ALSO

- iana — [IANA port registry — 1580](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=1580) (iana.org)

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HTML: <https://whatport.net/1580/> · JSON: <https://whatport.net/1580.json> · full dataset: <https://whatport.net/ports.json>