DNS
CloudFlare
2606:4700:4700::1111
2606:4700:4700::1001
2001:4860:4860::8888
2001:4860:4860::8844
Quad9
2620:fe::fe
2620:fe::9
https://www.youtube.com/watch?v=rWVm9JCR4Fc
https://www.youtube.com/watch?v=COblHE5hpfg
https://www.youtube.com/watch?v=lRty4OlZWjA