[russss]

WHOIS is generally very reliable - there are identity checks when you register for IP space (especially with ARIN, which is who provides Google's IP space).

One other way you can check is by looking at the organisation handle in the WHOIS - it's GOGL, which is the same org handle as you'll find on all their IP addresses if you WHOIS them. That ties up with the ARIN site:

http://whois.arin.net/rest/org/GOGL

I've done a fair bit of network engineering and I'm convinced that this is actually a Google address.