1. A method of configuring a content delivery network to override a Domain Name System (DNS) to route a request from a client to a geographically-proximal edge server, comprising the steps of: generating, by a server computer communicatively coupled to a network, a routing table for a content delivery network, said routing table mapping one or more edge server internet protocol (IP) addresses to each of one or more geographic regions via a plurality of data fields in the routing table comprising: an identifier for the content delivery network; a behavior; a geographic region of an origin server; a primary server and a secondary server; a primary IP address for the primary server in the geographic region; a backup IP address for an edge server in the geographic region; a location data field comprising a matching geographic region mapped, within the routing table, to a content server; and a behavior data field associated with the content server, wherein the behavior data field designates the content server as the origin server, a primary server or a secondary server for the matching geographic region; transmitting, by said server computer, said routing table to one or more DNS server computers communicatively coupled to said network, said DNS server computers comprising a DNS zone file for a domain name; 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 designating, by said server computer, a subscription data field identifying a content delivery network to which the domain name is subscribed within the DNS zone file for said domain name.