How to view serial COM ports but not through Device Manager

In the command prompt use

mode

Used without parameters, mode displays all the controllable attributes of the CON (console) and the available COM devices (and LPT as well).

Accepts /? switch for basic help:

mode /?

I know the question has been answered, but this is another method.

In command prompt, use:
chgport
in windows Vista and up. Lists your ports and which device they are.

In the command prompt use:

C:\>wmic path Win32_SerialPort

OR

In PowerShell:

PS> Get-WMIObject Win32_SerialPort

OR

PS> Get-WMIObject Win32_SerialPort | Select-Object Name,DeviceID,Description

Hope this helps.