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 may assign an alias resource records that point to another alias resource record or to an IP address. A DNS server of the service provider may receive a request to resolve a DNS query for a domain for which the DNS server is authoritative. The DNS server determine that the DNS query corresponds to an alias record and may resolve the DNS query according to the data of the alias record.