An IANA "Reserved" slot left over from an assignment removed in 2013 — nothing standard listens here.
The registry entry for 1030 is a bare "Reserved" with no service name and no assignee, annotated with the note that the entry was being removed on 2013-05-24. No protocol has owned this port since. It appears on scans of older Windows hosts because it sits in the pre-Vista dynamic RPC range of 1025-5000, and on anything else because some application grabbed a free low port.
Expose with care
An unregistered port is an unidentified service — resolve what owns it locally before deciding it is safe to reach.
$ sudo lsof -nP -iTCP:1030 -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.