Exhibit 21

ARRIS Group Inc. & Subsidiaries

as of February 29, 2012

ARRIS Group Inc., (Delaware), stock is publicly traded

ARRIS Solutions, Inc., (Delaware)

C-COR Solutions Pvt. Ltd. (India) — dormant

ARRIS Group Canada, Inc

Worldbridge Broadband Services S. de R.L. e C.V. (Mexico) — dormant

ARRIS Group de Mexico S.A. de C.V. (Mexico)

ARRIS Group Europe Holding B.V. (Netherlands)

ARRIS Group B.V. (Netherlands)

ARRIS Group B.V. France Branch

ARRIS Group B.V. U.K. Branch

ARRIS Germany GmbH (Germany)

ARRIS International Iberica S.L. (Spain)

ARRIS International Iberica S.L. Portugal Branch

C-COR Argentina S.R.L.

Texscan Corporation, (Nevada) — dormant

ANTEC International Corporation (Barbados) — dormant

Electronic Connector Corp. of Illinois, (Illinois)

Power Guard, Inc., (Illinois) — dormant

ARRIS Korea, Inc., (Delaware)

ARRIS Korea, Inc. Korea Branch

ARRIS Group, Inc., Sucursal Argentina (Argentina)

ARRIS Do Brasil LTDA (Brasil)

Arris Group Japan K.K. (Tokyo, Japan)

ARRIS Group Telecommunicaciones Compania Limited (Chile)

Arris Communications Ireland Limited (Ireland)

ARRIS Technology (Shenzhen) Co., Ltd. (China)

ARRIS Beijing Branch (China)

ARRIS Shanghai Branch (China)

BigBand Networks, Ltd. (Israel)

BigBand Networks, Inc., (Delaware)

BigBand Networks (Shenzhen) Co., Ltd. (China)

BigBand Deutschland GmbH (Germany)