Port 53000
In live entertainment systems, port 53000 is used by OSC.
udp/53000
OSC — QLab default OSC listening port
A transport-independent message format carrying named, typed messages such as /cue/5/go with int, float, string and blob arguments, optionally grouped into timestamped bundles. On a show it is the glue between QLab, lighting consoles, control surfaces and anything with a scripting port.
Check it from the command line
npx showstack port 53000
Not what you were looking for?
If you know something else uses port 53000, tell us. Adding it is one file.