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How to determine which COM # USB/Serial ports are assigned?

Anonymous
2012-04-12T13:04:54+00:00

I'm running Windows 7 Pro 32-bit and as the title asks, how do I determine which COM # is assigned to each USB/Serial port?

In this specific situation, I have a laptop with 3 USB ports and it is plugged into a docking station that has an additional 6 USB ports plus 1 Serial port.  The serial port is ultimately the one I need to find the COM # for, but I would like to be able to do this without going through a trial and error process.

Windows for home | Previous Windows versions | Devices and drivers

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  1. Anonymous
    2012-04-12T13:16:25+00:00

    Hi,

    With the laptop plugged into the docking station,

    go to the Device manager and on the Menu Bar select View

    Then select Devices by Connection.

    Depending on your system Find the entry for the PCI bus under the APCI compliant system (usually the fist entry)

    Find the USB Enhanced Host Controller and look under each USB Root Hub until you find the USB to Serial Port.

    The number should be listed.

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  1. Anonymous
    2012-04-12T15:28:34+00:00

    Excellent, thank you sir.  While my system actually didn't have it listed in the exact place as you said, I was able to easily check in a couple different places to find it.

    Mine ultimately had it in the same level as the USB Host Controllers, but was instead under the Intel Interface Controller -> Extended IO Bus -> Communications Port (COM 1)

    COM 1... go figure :P

    Again, thanks.

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