How To Find Router Subnet Mask

Finding the subnet mask of your router is quite a simple and straight forward process. If you are using a Windows computer, you can make use of the following how to find router subnet mask instructions to identify your router’s subnet mask:


  • STEP : 1 On your Windows computer, press the Windows key and the R key simultaneously. This action will open your Command Prompt
  • STEP : 2 In the Command Prompt window, type in ipconfig /all. Please type in these words exactly as they are given here on following how to find router subnet mask steps. Do not forget to leave space in between the two words. Also, do not forget to press the Enter key after entering the command.
  • STEP : 3 Windows ipconfig is a program that maintains and keeps track of your network connections. Once you type in this command, you will see that a list of all your network information appears on the screen (in the Command Prompt window).
  • STEP : 4 In the window, you will find a section called Ethernet adapter Local Area Connection. In this section, you can see the line that begins with the words, “Subnet Mask.”
  • STEP : 5 Now, look at the end of the line containing “Subnet Mask.” Here, you will find the subnet mask of your router. It usually starts with
  • STEP : 6 For example, it can be 255.255.0
  • STEP : 7 Another example is 255.0.0


Another method of finding out your subnet mask is by using the Control Panel on your computer. To achieve the same, follow the instructions given here:

  • STEP : 1 On your Windows computer, go to Control Panel. Select the Network & Internet Then choose the Network and Sharing Center option.
  • STEP : 2 If you are using one of the latest Windows systems, click the Change adapter settings option that is found on your left.
  • STEP : 3 In case you are using Windows Vista, you have to click Manage Network Connections. In this section, right-click the Local Area Connection option and then select
  • STEP : 4 In the window that appears next, click You can see your router’s subnet mask here.
  • STEP : 5 We have now seen the how to find router subnet mask steps to find out your router’s subnet mask.