Abstract: An apparatus, method and system are provided for roamer originated automatic telecommunication conferencing and broadcasting. The system embodiment includes a first switch for reception of a first incoming call leg from a roaming mobile unit or from another telecommunication device outside its assigned serving area. The first incoming call leg preferably designates a multiple leg service, such as a telecommunication conference, and also designates a subscriber group. Each particular subscriber group is predefined, and consists of a list of directory numbers to be included within the conference or broadcast session. In the various embodiments, the first switch communicates with a second switch or a database, and obtains a routing directory number to reroute the first incoming call leg, to form a second incoming call leg to the second switch.