The invention relates to locating mobile terminals comprising a plurality of recording servers, adapted to communicate with recorded mobile terminals, for communication relays, with the recording servers communicating between them and with location servers via an extended network and organized in a hierarchical tree of parent servers and child servers. Each location server comprises a database of mobile terminals constituted of a plurality of mobile terminal records, each of said mobile terminal records comprising address data of a mobile terminal recorded with a descending recording server of said location server in the hierarchical tree.