A communication control system for connecting a call using a local service number valid within a local service area within which a user equipment is positioned, and forwarding data via an internet protocol network, comprising a local number converter and a session controller group. The local number converter is located in each local service area, in response to a query specifying a local service number, accesses a database of correspondence between a local service number valid within the local service area and a global routable number, and determines a global routable number corresponding to the specified local service number. The session controller group accepts a call request including the local service number from the user equipment, queries the local number converter in the local service area within which the user equipment is positioned to convert the local service number into a global routable number, and routes the internet protocol network using the global routable number.