Public DNS Services

Sometimes 3rd party DNS servers perform better then assigned DNS servers. The ISPs sometimes add a delay to resolution to artificially throttle their users when surfing the web.

There are several public DNS servers that block Malware or Adult Content as well

CloudFlare: 1.1.1.1 - Resolve Everything 1.1.1.2 / 1.0.0.2 - Block Malware 1.1.1.3 / 1.0.0.3 - Block Malware & Adult AdGuard DNS: IPv4: 176.103.130.130, 176.103.130.131 IPv6: 2a00:5a60::ad1:0ff, 2a00:5a60::ad2:0ff AdBlock DNS: IPv4: 176.103.130.132, 176.103.130.134 IPv6: 2a00:5a60::bad1:0ff, 2a00:5a60::bad2:0ff CleanBrowsing: Family Filter: 185.228.168.168, 185.228.169.168 Adult Filter: 185.228.168.10, 185.228.169.11 Security Filter: 185.228.168.9, 185.228.169.9 Comodo Secure DNS: IPv4: 8.26.56.26, 8.20.247.20 IPv6: 2620:119:35::35, 2620:119:53::53 Yandex.DNS: IPv4: 77.88.8.8, 77.88.8.1 IPv6: 2a02:6b8::feed:0ff, 2a02:6b8:0:1::feed:0ff IBM Quad9+: IPv4: 9.9.9.10, 149.112.112.10 IPv6: 2620:fe::10, 2620:fe::fe SecureDNS: IPv4: 195.46.39.39, 195.46.39.40 IPv6: 2001:67c:28a4::, 2001:67c:28a4::1 Neustar DNS: IPv4: 156.154.70.1, 156.154.71.1 IPv6: 2610:a1:1018::1, 2610:a1:1019::1

Mullvad:

https://mullvad.net/en/help/dns-over-https-and-dns-over-tls