Public DNS Resolvers List

https://dnsprivacy.org/wiki/display/DP/DNS+Privacy+Test+Servers

https://www.dnsleaktest.com

https://www.dnsperf.com/#!dns-resolvers

If using pfSense and DNS Resolver, turn on DNS Query Forwarding and add the following to custom options:
server:
qname-minimisation: yes
forward-zone:
name: "."
forward-ssl-upstream: yes
forward-addr: [email protected]
forward-addr: [email protected]
forward-addr: [email protected]
forward-addr: [email protected]

Cloudflare
Provides: DNSSEC, DNS over TLS.
1.1.1.1
1.0.0.1
2606:4700:4700::1111
2606:4700:4700::1001

Quad9 - Secure
Provides: Security blocklist, DNSSEC, No EDNS Client-Subnet sent, DNS over TLS.
9.9.9.9
149.112.112.112
2620:fe::fe

Quad9 - Insecure
Provides: No security blocklist, DNSSEC, sends EDNS Client-Subnet.
9.9.9.10
149.112.112.10
2620:fe::10

Open DNS
208.67.222.222
208.67.220.220

Comcast
75.75.75.75
75.75.76.76

L3
209.244.0.3
209.244.0.4

Google
8.8.8.8
8.8.4.4

Untangle
74.123.28.4
74.123.29.4

DNS.Watch
84.200.69.80
84.200.70.40

Comodo Secure
8.26.56.26
8.20.247.20

ProtonVPN (DNS queries will not resolve unless you are successfully connected to ProtonVPN)
10.8.8.1