Registered for air traffic services over the ATN; in the wild it is VNC display :10.
IANA registers 5910 as ats-atn, "Air Traffic Services applications using ATN", over TCP and UDP, with a separate SCTP registration named cm (Context Management). These are aeronautical telecommunication network services on private infrastructure. On a normal host, 5910 is 5900 plus display 10 — a hypervisor that has allocated ten guest consoles, or a machine with a long-lived set of VNC sessions.
Do not expose
A double-digit VNC display usually means a virtualization host handing out guest consoles. That is an administrative surface and should be reachable only from the management network.
$ nc -w 3 TARGET 5910 | head -c 12; echoSeen 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.