Port 4809
In live entertainment systems, port 4809 is used by CITP.
udp/4809
CITP — PINF peer discovery and location messages (multicast)
An open protocol for the traffic between consoles, visualisers and media servers that is not the show itself: peer discovery, DMX, fixture data, and through MSEX, media libraries, thumbnails and live preview streams. It is what puts clip thumbnails on a lighting console's encoder wheel.
Check it from the command line
npx showstack port 4809
Not what you were looking for?
If you know something else uses port 4809, tell us. Adding it is one file.