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By the way, is it regarding computer?
If so, this is how you can find the com port..
1: Open Device Manager
(Click Start > search type devmgmt.msc press enter key)
2: On Device Manager > Open Ports (Com & LPT)
3: Under it you can find ports and number used by it
See image for more info
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Still waiting for your reply..
Did my suggestion helped to find out com port
Didn't find you back. Hope you are doing good.
I already posted the way to identify COM port used by computer. Did that help?
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I am glad to help if you still have query on same