Public DNS Servers
Sometimes you need a list of public DNS servers, there are some common ones and some not so common ones, here I present my go to list. These are in no way endorsed, but I do use them all fairly regularly. Where I say some services are Alternate Root these servers may give you different results than the rest.
DNS Benchmark Tool to test what is the best DNS for you
Public DNS Server List a huge list of various DNS servers listed as per geographic location! Awesome.