1 EXHIBIT 21 Subsidiaries of Plantronics, Inc. JURISDICTION OF COMPANY NAME INCORPORATION ------------ ------------- Emtel, S.A. Mexico Frederick Electronics Corporation Maryland Pacific Plantronics, Inc. California Plamex, S.A. de C.V. Mexico Plantronics Acoustics Italia, S.r.l. Italy Plantronics B.V. Netherlands Plantronics Canada Limited Canada Plantronics France S.A.R.L. France Plantronics Futurecomms, Inc. California Plantronics GmbH Germany Plantronics Holdings Limited Canada Plantronics International do Brasil, Ltda. Brazil Plantronics K.K. Japan Plantronics Limited United Kingdom Plantronics Pty. Ltd. Australia Plantronics, A.G. Switzerland 1