DNS Probes

Google DNS 8.8.8.8

Google DNS 8.8.4.4

OpenDNS1

OpenDNS2

Cloudflare DNS 1.1.1.1

Cloudflare DNS 1.0.0.1

Level3 DNS 4.2.2.1

Level3 DNS 4.2.2.2

Quad9 DNS 9.9.9.9