Registered as AeroFlight-ADs, with no assignee and no public documentation.
IANA lists 1218 on TCP and UDP under the service name aeroflight-ads ("AeroFlight-ADs"), and the registry carries no assignee for it. No specification, vendor page, or open-source implementation of the protocol is publicly available. That is the whole honest picture: the number is reserved, and nothing well-documented uses it. Anything found listening here should be identified from the host itself.
Expose with care
Unknown service; do not expose a listener you cannot name.
$ sudo lsof -nP -iTCP:1218 -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.