What is Google DNS
Google Public DNS represents two servers with IP addresses for IPv4 – 184.108.40.206 and 220.127.116.11. 18.104.22.168 is the primary DNS, 22.214.171.124 is the secondary one.
Google DNS service is free to use and can be used by anyone who has access to the Internet. You can use Google servers IP addresses as alternate DNS instead of such provided by your ISP with the purpose to resolve Internet names faster and improve your security.