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Open DNS Resolver Checker

Open DNS Resolver Check is a tool to test if you are running an open DNS resolver on the computer or router you are connecting from. This can help identify possible security vulnerabilities.

We have now retired our Open DNS Resolver Checker. You can find other tools online by searching for Open DNS Resolver checker. Please check if any of our other broadband tools are of interest such as a speedtest.

What is DNS?

DNS or Domain Name System is a method by which friendly website addresses (such as www.thinkbroadband.com) get translated into the IP address of the computer running the web site. This IP address is needed for your web browser to be able to connect to the web server. DNS is also used for e-mail amongst other things.