Some of the most trustworthy, high-performance DNS public resolvers and their IPv4 DNS addresses include: Cisco OpenDNS: 208.67. 222.222 and 208.67. 220.220; Cloudflare 1.1. 1.1: 1.1. 1.1 and 1.0. 0.1; Google Public DNS: 8.8. 8.8 and 8.8. 4.4; and. Quad9: 9.9. 9.9 and 149.112. 112.112. 23 Sept 2019