Some do and some don’t. Even if the IP changes, the actual IP address will be shown on the WHOIS site. Alternatively, I am sure that the actual IP address of these sites is shared by non-American users on forums and other sites.

The Selfish Ledger

If they are not blocking the access to the WHO.is servers you can get the IP address of the site and add it to your local hosts file.

When the leaked internal video came out about Google’s real vision, everyone said it is fake. It does not look that fake now.