Question

A company just asked me to open port 44380 in my firewall so that their software could work.

This made me wonder... what is the customary use for port 44380?

Answer 1

According to IANA port assignments, 44380 is in the unassigned range. Maybe some custom software uses it for communication

pmcdproxy      44322/udp   PCP server (pmcd) proxy

               44323-44552 Unassigned

Can't find any entry for the same in Wikipedia either

Answer 2

they could have asked you to open 44379 or 44381 as well. there is no .. real reason behind their question. they just need an open port.

Answer 3

Probably just their custom software needs that port. I don't see any software that is IANA registered for that port.