- 1&1 Internet : 55,000 servers (company)
- Rackspace : 50,038 servers (company)
- The Planet : 48,500 servers (company)
- Akamai Technologies : 48,000 servers (company)
- OVH : 40,000 to 55,000 servers (company)
- SBC Communications: 29,193 servers (Netcraft)
- Verizon : 25,788 servers (Netcraft)
- Time Warner Cable : 24,817 servers (Netcraft)
- SoftLayer : 21,000 servers (company)
- AT&T : 20,268 servers (Netcraft)
- Peer1/ServerBeach : 10,277 servers (company)
- iWeb : 10,000 servers (company)
Source: Data Center Knowledge