Registered as Utilistor Server; in the field, one more alternate HTTP port.
IANA lists 8083/tcp and /udp as us-srv, the server half of the Utilistor pair that owns 8082. Nmap keeps the same name and records it as uncommon. Like its neighbours it is used generically: an extra HTTP listener, a management interface, or a service published from a container. Fingerprint it rather than trusting the registered name.
Expose with care
Whether this is safe depends entirely on the application answering. Check whether it requires authentication and whether it was ever supposed to be reachable from outside.
$ curl -sI http://TARGET:8083/Seen 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.