google-public-dns-b.google.com is better known as 220.127.116.11
This is one of the host names for Google Public DNS. This is a free Domain Name System (DNS) service offered to Internet users worldwide by Google. It functions as a recursive name server.
The service was launched by Google in December 2009.
See also google-public-dns-a.google.com which is better known as 18.104.22.168
Duncan is a technology professional with over 20 years experience of working in various IT roles. He also has a wide range of other skills in radio, electronics and telecommunications.