According to embodiments of the present invention, there is provided a method, system and apparatus for handling a request for a communication session. The method comprises receiving, at a processing time, a request for a communication session, the request comprising a destination network identifier, the destination network identifier having been registered in association with a plurality of communication clients; the request having been originated by an originating party associated with an originating identifier. The method further comprises identifying, based on at least one of the originating network identifier and the processing time, a subset of the plurality of communication clients. The method further comprises delivering the request to the subset of the plurality of communication clients.