US Patent 8626950 Request routing processing

Generally described, the present disclosure is directed to managing request routing functionality corresponding to resource requests for one or more resources associated with a content provider. A service provider can assign a set of DNS servers corresponding to a distributed set of network addresses, or portions of network addresses, for one or more identifiable domains. If the service provider receives requests to assign DNS server to conflicting domains, the set of DNS servers for each identifiable are assigned such that there are no matching network addresses between the sets of domains associated with the conflicting domains.