Friday, November 22, 2013

Scanning for Google's internal corporate subdomains

For some reason Gmail appears to use an internal DNS server. This allows to verify existence and even resolve the IP addresses of Google's internal corporate domain names. For example, if you send an e-mail to you will receive an error response:

So apparently there's a server located at and its ip address is
Here's a list of some of these domain names (of course it's not comprehensive).
Some companies:[::ffff:],

Google's corporate structure:

And a lot of other words: