1. A method for processing a session request in an internet protocol network, the method comprising: receiving, by a processor, the session request from a calling party to a called party, wherein the session request includes a service tag; determining, by the processor, a value of the service tag in the session request, wherein the service tag comprises a label that is added to the session request that indicates a type of service for the session request, wherein the value of the service tag represents at least one of: a voice service or a video share service; querying, by the processor, a telephone numbering mapping server for a plurality of naming authority pointer resource records associated with the called party; selecting, by the processor, one of the plurality of naming authority pointer resource records in accordance with the service tag, when the plurality of naming authority pointer resource records associated with the called party are returned from the telephone numbering mapping server, wherein the one of the plurality of naming authority pointer resource records comprises a telephone Universal Resource Identifier when the value of the service tag indicates the voice service, and wherein the one of the plurality of naming authority pointer resource records comprises a session initiation protocol Universal Resource Identifier when the value of the service tag indicates the video share service; and processing, by the processor, the session request using the one of the plurality of naming authority pointer resource records that is selected.