EXHIBIT 21 SUBSIDIARIES OF NEWBRIDGE NETWORKS CORPORATION The names of certain other subsidiaries, which considered in the aggregate would not constitute a significant subsidiary, have been omitted. Jurisdiction Name of of Incorporation Subsidiary or Organization - ---------- --------------- Newbridge Networks Inc. Delaware Newbridge Networks Limited England and Wales Newbridge Networks (Asia) Limited Hong Kong Advanced Computer Communications California Transistemas S.A. Argentina Newbridge Networks Telecomunicacoes Ltda. Brazil Newbridge Networks de Mexico, S.A. de C.V. Mexico Newbridge Networks S.A. France Ouest Standard Telematique, S.A. France Newbridge Networks (Middle East) WLL Bahrain Newbridge Networks Japan KK Japan Newbridge Networks Australia (Pty.) Limited Australia Newbridge Networks Korea Ltd. Korea Newbridge Networks Venezuela, S.A. Venezuela Newbridge Networks GmbH Germany Newbridge Networks Ireland Ltd. Ireland Newbridge Networks (Pty) Ltd South Africa Newbridge Networks International Corporation Barbados Newbridge (Barbados) Corporation Barbados Newbridge Networks S.p.A. Italy Newbridge Networks GmbH (Austria) Austria Coasin Chile S.A. Chile Acacia Limited Barbados Newbridge Networks (APL) L. BHD Malaysia Danring A/S Denmark Page 184