A method of providing telephony services can include receiving a request to query a subscriber information data store to determine service description information for a call. The service description information can specify at least one telephony service associated with a subscriber for use in processing the call. The method further can include querying the subscriber information data store to determine the service description information, receiving the service description information from the subscriber information data store, and providing the service description information to a telephony service node to implement a telephony service specified by the service description information with respect to the call.