Best free and public DNS servers in 2021

 1. OpenDNS

208.67.222.222 

208.67.220.220

2. Cloudflare

1.1.1.1 

1.0.0.1

3. Google Public DNS

8.8.8.8 

8.8.4.4

4. Comodo Secure DNS

8.26.56.26

8.20.247.20

5. Quad9

9.9.9.9 

149.112.112.112

6. Verisign DNS

64.6.64.6

64.6.65.6