Registered to "Optima VNET" and essentially unseen in the wild — a listener here is almost certainly something else.
The IANA registry assigns 1051 to optima-vnet, "Optima VNET", a vendor registration with no public protocol specification and no surviving product documentation. Nmap sees it on well under a tenth of a percent of scanned hosts. There is nothing further that is true to say about the registered service. If you find TCP 1051 open, treat the registry name as a coincidence and fingerprint the listener — ports just above 1024 are frequently claimed by application servers, tunnels, and test harnesses that never consulted the registry.
Expose with care
Unknown service on an unprivileged port: you cannot reason about its exposure until you know what is actually listening. Identify it first.
$ nmap -Pn -sV -p 1051 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.