1. A method of configuring a content delivery network to override the DNS system to route a request from a client to a geographically-proximal edge server, comprising the steps of: A) generating, by at least one server computer communicatively coupled to a network, a routing table for a content delivery network, said routing table mapping one or more edge server IP addresses to each of one or more geographic regions; B) transmitting, by said at least one server computer, said routing table to one or more DNS server computers communicatively coupled to said network; C) receiving from a registrant of a domain name, by said at least one server computer, a request to subscribe said domain name to said content delivery network; and D) designating in a DNS zone for said domain name, by said at least one server computer, said domain name as subscribed to said content delivery network.