Google Public DNS service launched in December 2009 as an experimental service which allows users around the world to access internet faster by replacing their DNS provider IP addresses with Google DNS server addresses. Google today announced that they’re the largest public DNS service in the world handling over an average more than 70 billion requests per day.

“Google Public DNS has become particularly popular for our users internationally. Today, about 70 percent of its traffic comes from outside the U.S. We’ve maintained our strong presence in North America, South America and Europe, and beefed up our presence in Asia. We’ve also added entirely new access points to parts of the world where we previously didn’t have Google Public DNS servers, including Australia, India, Japan and Nigeria.” blog post reads.

Google Public DNS

Google made a technical proposal after its service launch called  ‘edns-client-subnet” with Content Distribution Networks’ providers where Google passes the information to CDNS to send their users to near by Google DNS Servers. While Google is working with the internet Engineering Task  Force, where their members continues to discuss the proposal, other companies started with implementing this proposal – Google Says.

Google Public DNS service available for IPv6 users -so they can reach and use this service over IPv6 with addresses: 2001:4860:4860::8888 and 2001:4860:4860::8844 which supplement  original addresses: 8.8.8.8 and 8.8.4.4