Method for dynamically obtaining telephone numbers

A method for automatically changing the address and telephone number of an occupant when the occupant moves from one internal address to another internal address. The foregoing is accomplished by placing a radio frequency identification tag in occupant's nameplate, wherein the tag contains encoding information that identifies the occupant so that when the occupant changes his/her location, the nameplate may be used to update a data base and determine the occupant's new address and telephone number.