Patent ID: 8458360

Claim:
A computer-implemented method comprising: as implemented by one or more computing devices configured with specific executable instructions, obtaining a DNS query from a client computing device at a first DNS server, wherein the DNS query corresponds to a requested resource associated with an original resource identifier provided by a content provider and wherein the first DNS server corresponds to a content delivery network service; obtaining a query IP address associated with the DNS query at the first DNS server, wherein the query IP address is associated with the client computing device; obtaining a location-based identifier associated with the query IP address and a confidence factor, the confidence factor corresponding to a degree of confidence associated with the accuracy of the location-based identifier to query IP address association; determining whether the confidence factor exceeds a threshold value; and if the confidence factor exceeds the threshold value: determining a destination identifier associated with the DNS query, wherein the destination identifier is determined based on the location-based identifier; and selecting a network point of presence associated with the content delivery network service provider based on the destination identifier.