Abstract: A system and method in a radio telecommunications network of utilizing a plurality of telephone numbers with a single mobile telephone by changes to the network rather than the mobile telephone are disclosed. The system provides a mobile subscriber with an indication of the directory number dialed by the calling party. A plurality of directory numbers, a plurality of mobile identification numbers (MINs), and a plurality of alpha-numeric strings are stored in a database in the network such as a home location register (HLR). Several directory numbers are associated with the mobile telephone's MIN, and then each directory number is associated with an alpha-numeric string. When a directory number is dialed, an associated MIN and alpha-numeric string are identified. The MIN and alpha-numeric string are then transported through the network to the mobile telephone while the mobile telephone is being alerted.