Public DNS Resolver

Cloudflare public DNS (IPv4).

1.1.1.1

Google Public DNS (IPv4+IPv6).

8.8.8.8
8.8.4.4
2001:4860:4860::8888
2001:4860:4860::8844

Cisco OpenDNS (IPv4).

208.67.222.222
208.67.220.220