IANA-registered to the Nucleus Sand database server; a historical assignment you will rarely encounter.
Port 1201 is registered on TCP and UDP as nucleus-sand, "Nucleus Sand Database Server", assigned to James Marsh. The Sand analytic database (later Sand Technology's Nucleus/SAND CDBMS) is a niche column-store product with no current public protocol documentation at this port. There is nothing else well documented that habitually squats here, so an open 1201 on a modern host is almost certainly an unrelated program that grabbed a free registered port.
Expose with care
If this really is a database listener it belongs on a private network; if it is not, identify the process before leaving it reachable.
$ sudo lsof -nP -iTCP:1201 -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.