If you want to know about a particular IP allocation, whois will help you out $ whois 173.194.55.0 I won't include the whole output, but here is the link of t

If you want to know about a particular IP allocation, whois will help you out $ whois 173.194.55.0 I won't include the whole output, but here is the link of the allocation: http://whois.arin.net/rest/net/NET-173-194-0-0-1 http://whois.arin.net/rest/net/NET-173-194-0-0-1 Basically, this listed IP block is part of a much larger allocation for Google. I don't know exactly what type of google service is hosted from it, but it isn't a commercial CDN.