Registered as eXcW; a legacy assignment with no public documentation.
IANA lists 1271 on TCP and UDP as excw ("eXcW"), registered by Norm Freedman. No specification or current product documentation for the protocol is publicly available, and no widely documented software squats on the number. On a scan this is an unidentified listener whose identity has to come from the host, not from the registry.
Expose with care
Unknown service; do not leave a listener you cannot identify reachable from untrusted networks.
$ sudo lsof -nP -iTCP:1271 -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.