From an interesting article in Data Center Knowledge Who has the Most Web Servers:

• 1&1 Internet: 55,000 servers (company)
• OVH: 55,000 servers (company)
• Rackspace: 50,038 servers (company)
• The Planet: 48,500 servers (company)
• Akamai Technologies: 48,000 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)

The article continues to speculate on server counts at the companies that publically disclose server counts but are likely over 50k.  Google is likely around a million, microsoft is over 200k, and "Amazon says very little about its data center operations".

                                --jrh

James Hamilton, Amazon Web Services

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