If you only need DNS servers instead of your ISP ones you should familiar
with OpenNIC that is an alternate network information center/alternative DNS
root which lists itself as an alternative to ICANN and its registries.
https://www.opennicproject.org/
Check your the nearest DNS servers
https://www.opennicproject.org/nearest-servers/
Or look them up in the following list
https://servers.opennicproject.org/
In addition, it worth checking what DNSCrypt is because it improves DNS
security
https://www.dnscrypt.org/
Un saludo,