No registration and no known convention — an arbitrary high port.
IANA does not assign 44176, and Nmap lists it as unknown with an open frequency near 0.02%. There is no documented product or protocol that claims it, so a listener here is entirely a local decision. The number is inside Linux's default ephemeral range as well, so many sightings are client-side sockets.
Expose with care
Identify the process first; an unregistered port gives you no basis to judge whether the service behind it authenticates.
$ sudo lsof -nP -iTCP:44176 -sTCP:LISTENSeen this on your network? Beige Box scans your Wi-Fi and shows every open port on every device — and its Ports tool links straight back here.
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Corrections or a missing port? Reply @rimrocksystems.