8.8.8.8

Interpreted as: What DNS Server is 8.8.8.8?

8.8.8.8 is the primary DNS server for Google DNS.

Google DNS is a public DNS service that is provided by Google with the aim to make the Internet and the DNS system faster, safer, secure, and more reliable for all Internet users.

Google's service, like many of the other global DNS servers is available for anyone to use. Some ISP's are now even preferring to assign Google's servers than use and maintain their own.

For more information on Google Public DNS and what 8.8.8.8 is for, check out the Google Public DNS page.