That doesn't appear to be Google. I get it blocked as 'Suspicious - Placeholder'.
http://www.findip-address.com/198.105.251.46/whois
Handle NET-198-105-240-0-1
Ref Whois-RWS
Name SEARCHGUIDE
OrgRef Search Guide Inc
CIDR Length 20
Start Address 198.105.240.0
End Address 198.105.255.255
Type DS
Description Direct Assignment