Registered as LM Social Server, but a memorable number that assorted software squats on.
IANA lists 1111 as lmsocialserver for TCP and UDP. The registration has no public specification, and the port's real-world appearances are mostly unrelated software choosing a memorable four-ones number for a local service or test listener. Nmap still ranks it among the more commonly seen ports in this block, which reflects that squatting rather than any deployment of LM Social Server.
Expose with care
A convenient round number attracts ad-hoc dev listeners; confirm what is bound and whether it has any authentication before it leaves localhost.
$ sudo lsof -nP -iTCP:1111 -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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