Another unregistered number in Nmap's top-1000 list with no documented owner.
IANA has no assignment for 16018, and Nmap records it as unknown while still scanning it by default because of its observed open-port frequency. No mainstream software documents 16018 as a default listener. If you find it open, the only honest description is "an unidentified TCP service" until you fingerprint it.
Expose with care
An unattributed listener is the finding. Trace it to a process locally rather than reasoning from the port number.
$ sudo lsof -nP -iTCP:16018 -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.