Unassigned by IANA, yet turns up in scan data more often than its registered neighbours.
IANA lists 8028-8031 as Unassigned and Nmap has no service name for 8031, but Nmap's frequency data still ranks it above many named ports nearby — roughly a quarter of a percent of scanned hosts. That combination usually means a widely deployed product picked the number without registering it, rather than one standard protocol. Nothing well-documented pins it down, so treat the number as a hint and fingerprint the service.
Expose with care
No registration means no protocol-level verdict. Identify what answers before you decide whether it belongs on a public address.
$ nmap -sV -Pn -p 8031 TARGETSeen 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.