How to Compare your ISP’s DNS Servers with Others

I was recently faced with a situation where the response time of an ISP’s DNS servers on a network I was supporting seemed to be slower than they should have been.  Fortunately, there is a great tool available that I was able to use to test these DNS servers against the response time of public DNS servers like Google’s and OpenDNS’s.  In the following article I would like to show you how to use this tool to do the same on networks you support.

The tool is called DNS Benchmark and it was created specifically for benchmarking available DNS servers.  It is a stand-alone app so nothing has to be installed.  You can even run it directly from your flash drive.

The first thing you will need to do is download and run DNS Benchmark.

After the program opens, click the “Nameservers” tab and click the “Add/Remove” button to add your DNS servers.


Enter your DNS server addresses clicking “Add” after each one.  When finished, click the “Close” button.


Now you can run the DNS benchmark test by clicking the “Run Benchmark” button.


Once the test finishes, you will see a list of all the DNS servers sorted by fastest response time.


If the ISP’s DNS servers are not responding faster than the public DNS servers then you may want to contact the ISP or start using the faster public DNS servers instead.

About The Author


Casey (Surname withheld for contractual and professional reasons) has contributed many great articles on He successfully started his own IT consultancy well over 10 years ago. While going through this tough yet rewarding experience he found there was a terrible lack of focused support out there for computer techs to start their own IT company. So he gravitated towards training and mentoring other computer technicians who want to create a part time or full time income as an IT consultant. He initially wrote courses to help computer technicians start their own IT consulting business (or side business). Many articles also help the general public save thousands of dollars in professional help by helping them DIY. He doesn't contribute directly to often any more due to leading a full family life and being Technical Director a at major US company (hence the requirement for privacy). However his contributions span over 10 years and some have been extremely popular (with so many comments we had to stop accepting more on some, and thousands of shares although it looks fewer after our change to https - we must get around to fixing that!). Having said this, we work to ensure his work is updated and continues to remain relevant.

Leave A Response

Time limit is exhausted. Please reload CAPTCHA.

* Denotes Required Field