EXHIBIT 21 SUBSIDIARIES OF COMVERSE TECHNOLOGY, INC. JURISIDICTION OF SUBSIDIARY INCORPORATION Comverse Technology (Europe) Ltd. U.K. Comverse Technology GmbH Germany Comverse Technology Nordic OY Finland Comverse Asia Pacific Limited Hong Kong Comverse Australasia Pty. Ltd. Australia Comverse Government Systems Corp. New York Comverse Information Systems Corp. Delaware Startel Corporation California Dale, Gesek, McWilliams & Sheridan, Inc. New Jersey Efrat Future Technology Limited Israel CTI Capital Corporation Delaware Comverse Investments Limited Israel Telemesser Limited Israel