I joined a few older posts together (and redirected those old posts here) to create a single place for my public dns services list and instructions.
Short list of IP addresses if you know what your doing
google: 8.8.8.8 8.8.4.4
opendns: 208.67.222.222, 208.67.220.220
quad9 (IBM): 9.9.9.9
cloudflare: 1.1.1.1, 1.0.0.1
Do you think it’s good idea to use quad9 as primary and google as secondary (9.9.9.9 + 8.8.8.8) ?
I’ve used google and opendns as primary / secondary for a while now – quad9 then google should be fine :)