Top 10 US web hosts ratings, based on domains, March 2012.

Rank Hosting Company Domains
1 Wildwestdomains 32,716,568
2 Oneandone 2,904,886
3 Hostgator 2,041,498
4 Yahoo hosting 1,655,238
5 Bluehost 1,609,470
6 Dreamhost 1,209,572
7 Hostmonster 764,621
8 Mediatemple 468,184
10 Ipowerweb 449,337
9 ATT-hosting 447,730


The entire data set currently consists of all COM, NET, ORG, BIZ, INFO Domain Names.

The clients of a Web Hosting company are identified as all Domains served by the nameservers of that particular Company.

Source of data: webhosting.info