If the name of the process for the port number you’re looking up makes it difficult to tell what the related app is, you can try a version of the command that shows process identifiers (PIDs) rather than names. PicPick is an image editor on our system, so we can assume the port is actually tied up by the process that regularly checks for updates to the app. Here, for example, you can see that port 49902 is tied up by a process named picpick.exe.
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RELATED: How to Save the Command Prompt's Output to a Text File in Windows You could then just search the text file for the port number you’re after. If you’d like to make things a little easier, remember that you can also pipe the results of the command to a text file. Scroll through the list to find the port (which is listed after the colon to the right of the local IP address), and you’ll see the process name listed under that line. For those times, you’ll need to list active ports along with their process identifier numbers and then look those processes up in Task Manager.Īfter you hit Enter, the results may take a minute or two to fully display, so be patient. Sometimes, though, the process name won’t help you identify what app or service actually has a port tied up. Most of the time, that command will work fine. The first lists active ports along with the name of the process that’s using them. Use Built-In Tools to See What Is Listening on a Port All these methods should work no matter which version of Windows you use. There are a number of ways to tell what application has a port locked, but we’re going to walk you through a couple of built-in ways that use the Command Prompt, PowerShell, or the Terminal, and then show you a great freeware application that makes it even easier. RELATED: What's the Difference Between TCP and UDP? In that case, you’ll need to identify the app that already has that port in use. But once in a while, you might encounter an app that’s set to listen for traffic on the same port that another app already has in use. For the most part, you don’t need to worry about ports. If the IP address is akin to a street address on a piece of mail, the port is something like the name of the person at that residence who gets the mail. RELATED: How to Port Forward on Your Router Once the traffic reaches the right place, the device needs to know which app or service to send the traffic on to. When one device sends traffic to another, the IP address is used to route that traffic to the appropriate place. Use NirSoft CurrPorts to View What is Listening on a PortĪn IP address specifies a computer - or other network device - on a network. Option Two: View Port Use Along with Process Identifiers Option One: View Port Use Along with Process Names
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