SERVER AND INFORMATION MANAGEMENT SYSTEM

PROBLEM TO BE SOLVED: To provide a server and an information management system which can confirm whether a telephone number and a mail address registered in a telephone directory are valid or invalid, or changed by asking to the server which manages telephone numbers and mail addresses of a plurality of mobile telephone terminals. SOLUTION: The subscriber management server 400 collates telephone directory data received from the mobile telephone terminal 100 with subscriber data, and searches a telephone number or a mail address included in the telephone directory data. If there is a coincident telephone number or mail address, the server compares a registered date and a time of a telephone number or a mail address registered in the subscriber data with a registered data and a time of the telephone number and the mail address included in the telephone directory data, and notifies whether the telephone number or the mail address is valid or invalid at present to the mobile telephone terminal 100. COPYRIGHT: (C)2007,JPO&INPIT