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It is nominally the nCube License Manager, but also many SQL systems, like SQL*Net and others, use this port. Are you using any SQL on this system? Is it an nCube system? If either of these is true, leave it alone. Otherwise, there are a number of things you can do. I don't know what sort of system you have, but depending on the OS, there are utilities or tools to tell you what processes are running on what ports. On Unix, the tool is "netstat." There are equivalent programs for other OSs. That's likely to tell you whether you should be concerned. There's also the brute force approach -- shut down the port, and see what breaks.
Dig Deeper on Network Firewalls, Routers and Switches
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