The last of the unnamed 27352-27356 group; unassigned, with no documented service.
IANA has 27356 in the unassigned block 27346-27441, so there is no registration to cite. Nmap lists it as 'unknown', with the lowest open-frequency of the four nearby ports it is usually reported with. There is no public record of a product, protocol or malware family that binds it. Anything open here has to be identified directly.
Expose with care
No standard service and no default guidance. Identify the listener, then decide.
$ nc -vz TARGET 27356Seen 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.