Google DNS :

Primary DNS 8.8.8.8 

Secondary DNS 8.8.4.4

OpenDNS :

Primary DNS 208.67.222.222

Secondary DNS 208.67.220.220

Advantage DNS : 

Primary DNS 156.154.70.1 

Secondary DNS 156.154.71.1

ScrubIT :

Prmary DNS 67.138.54.100 

Secondary DNS 207.225.209.66

Comodo Secure DNS 

Primary 156.154.70.22

Secondary 156.154.71.22

Quad9

9.9.9.9 Filtered for malware

149.112.112.112

IPv6 enter 2620:fe::fe

Cloudflare / [Quad1?] ;-) 'Faster' DNS [Public] Sometimes faster...

  • For IPv4: 1.1.1.1 and 1.0.0.1
  • For IPv6: 2606:4700:4700::1111 and 2606:4700:4700::1001

How to use them (LINK)