Unassigned by IANA — sits in the 6245-6250 gap next to JEOL's instrument ports.
The registry shows 6245-6250 as unassigned. Its only notable neighbours are 6241-6244, registered to JEOL for their Network Services data transport and discovery protocols used by scientific instruments. Nothing is documented as using 6247 itself. A listener here is an application that picked a free high port, so identify it by process rather than by port number.
Expose with care
An unregistered, unidentified listener gets no verdict until you know what it is; do not expose it externally in the meantime.
$ sudo lsof -nP -iTCP:6247 -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.