What you're looking for is the "netstat" command, which is available in both Windows 10 and Linux. The command line options are different but you can get a list of active ports easily with either one.
Linux: netstat --help
Windows: netstat /?
Cool, thank you! I wasn’t sure if Win 10 would let you see what the port assignments were or not. My wife’s is dual boot linux over Win 10. I will have to go try to get a list from hers.