It shows all the ports used by Windows and other programs. Nirsoft Utilities has a pretty neat and lightweight tool called CurrPorts. If you want the used port list to be updated automatically, follow one of the two methods illustrated below. You have to execute the command again when you need an updated list. Keep in mind that the list will not be refreshed automatically.
You can see the highlighted portion of the attached image for better representation.
You will see the port number right next to the IP address (ex: 192.168.42.198:50943) in the output result. You can copy and paste the command into the Command Prompt window by right-clicking inside it. In the elevated command prompt window, execute the below command. Search for “cmd” in the start menu, right-click on the Command Prompt and select “Run as Administrator.” This option lets you open the command prompt with admin rights. This method is quite helpful if you want to take a quick glance at the ports in use. Using a single command, you can get a list of all the ports in use by various programs. Note: The methods shown below work in Windows 7, 8, 10, and 11. So, without further ado, let me show the steps to find which ports are used in Windows 10 and 11 operating systems. The good thing is that it is pretty easy to know which port is used by which application in Windows. That way, you can either change the port or terminate the problem-causing application so that the other one works as it should. In those situations, it is better to know which ports are used and which application is using that specific port. When that specific port is already in use by one application, the other application cannot use that port, and it may show a warning message, error out, or crash entirely. Two or more applications may need the same port to work from time to time. With all those applications, it is only natural that they use many network ports. 
Windows has many applications connected or trying to connect to the internet at any point in time. Use Sysinternals TCPView to check ports in useĬan’t use a specific port? Here’s how to check which port is in use in Windows with simple commands and apps like currports and tcpview.How to Find the Process Listening to Port on Windows 10 & 11
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