To know which DNS servers would be the best/fastest one based on your location (IP address), visit the following website:
Note: I used to use 220.127.116.11 and 18.104.22.168.
It’s basically a site that dynamically updates a listing of thousands of fast and slow DNS servers, and [simply] visiting it will give you your top 3 servers. All you have to do is enter the results into your router or computer’s TCP/IP settings and of you go!
Hope this helps. \m/