A Domain Name Service server (DNS server) is a special type of computer that your computer connects with to determine what IP address is associated with a URL that you are trying to visit on the web. If you want to know what the IP address of this DNS server is, you can look it up by running a simple command in your command prompt.
Press the "Windows" and "R" keys simultaneously to open the Run box.
Type "cmd" and click the "OK" button.
Type "ipconfig /all" at the command prompt and press the "Enter" key. Your DNS server address is listed next to the "DNS Servers" label.