Abstract: A method is described for telephone broadcasting warnings, information or the like into defined geographical areas. The method provides for: dividing the interested area into geographic zones; associating with the directory number of each fixed telephone set an information indicating the geographic zone inside which said fixed telephone set is installed; providing each public telephone exchange with geographic zone information related to the directory number controlled by it; where requested, providing the text of a message and the list of the geographic zones to which such message is to be sent; and having all the directory numbers associated with the interested geographic zones automatically called by the telephone exchanges. In particular, the message could concern the announcement of impending natural calamities.