RELATED: How Do I Know if I'm Running 32-bit or 64-bit Windows? #WINDOWS PORT MAP DOWNLOAD#Just unzip the download folder and run executable. #WINDOWS PORT MAP INSTALL#It’s a portable app, so you won’t need to install it. #WINDOWS PORT MAP WINDOWS#Just make sure you get the right version (the regular version is for 32-bit Windows and the 圆4 version is for 64-bit Windows). If you aren’t really the Command Prompt type-or you’d rather just use a simple utility to do all this in one step-we recommend the excellent freeware CurrPorts utility by NirSoft. Use NirSoft CurrPorts to View What is Listening on a Port When Once you’re there, you can use the End Process, Open File Location, or Go to Service(s) options to control the process or stop it. If not, right-click the process and choose “Open file location.” The location of the file will likely give you clues as to what app is involved. You might be able to tell more about what app or service has the port tied up by looking at the “Description” column. Sort the list of process by the “PID” column and find the PID associated with the port you’re investigating. In older versions of Windows, you’ll see this information on the “Processes” tab. #WINDOWS PORT MAP WINDOWS 8#If you’re using Windows 8 or 10, switch to the “Details” tab in Task Manager. Next, open up Task Manager by right-clicking any open space on your taskbar and choosing “Task Manager.” The column at the far right lists PIDs, so just find the one that’s bound to the port that you’re trying to troubleshoot. Type the following text at the Command Prompt, and then hit Enter: netstat -aon 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. Option Two: View Port Use Along with Process Identifiers 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. 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. #WINDOWS PORT MAP HOW TO#RELATED: How to Save the Command Prompt's Output to a Text File in WindowsĪfter you hit Enter, the results may take a minute or two to fully display, so be patient. When you see “Command Prompt” appear in the results, right-click it and choose “Run as administrator.”Īt the Command Prompt, type the following text and then hit Enter: netstat -ab Hit Start, and then type “command” into the search box. Option One: View Port Use Along with Process Namesįirst, you’ll need to open the Command Prompt in administrator mode. 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. 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, 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. 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. An IP address specifies a computer-or other network device-on a network.
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