Inside IANA's old VRML block, with no service that commonly claims it — an open 4279 is whatever someone configured.
IANA assigned the whole 4200–4299 range to VRML Multi User Systems decades ago, and 4279 has no individual registration or reference. No widely deployed software defaults to it, and scan frequency data puts it near the bottom of the list. Identify the listener directly; the registry name tells you nothing about what is actually there.
Expose with care
Unclassified by definition — fingerprint the service and apply that service's rules.
$ nc -vz -w 3 TARGET 4279Seen 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.