If you investigate the address the info you get is an address record.
fra07s07-in-f100.1e100.net A 209.85.148.100 86400s
Which can be confirmed as belonging to Google Inc.
If you type the ip address in directly in the address bar (in my case Firefox) it resolves to the standard search page. If you then investigate
Google.co.uk and
Google.com neither use that address both use 74.125.227.xxx addresses.
Which leads to the question what are you trying to access within Google's setup to give this error ? Do you have Google set as a home page ?