Google Public DNS launched on December 3, 2009, which was introduced to help make the web faster for everyone -- today, handling an average of more than 70 billion requests a day, according to Google.
"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," posted Google.
Google also made a proposal called "edns-client-subnet" for how public DNS services can work better by sending users to nearby CDNs (content distribution networks) that have servers all of the world -- is currently discussed by members of the Internet Engineering Task Force, and other companies have started experimenting with implementing this proposal.
Also, Google announced support to help IPv6 implementation with following IPv6 addresses: 2001:4860:4860::8888 and 2001:4860:4860::8844 to supplement original addresses, 126.96.36.199 and 188.8.131.52.