Exhibit 21

ARRIS Group Inc. & Subsidiaries

ARRIS Group Inc., 58-2588724 (Delaware), stock is publicly traded

ARRIS Solutions, Inc., 26-1522408 (Delaware)

C-COR Incorporated, 36-3977107 (Delaware)

Broadband Management Solutions LLC, 25-1891946

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

C-COR Electronics 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)

C-COR Broadband Communications Europe GmbH (Austria — liquidating)

C-COR Iberica S.L. (Spain)

C-COR Iberica S.L. Portugal Branch

nCUBE UK Ltd. (dormant)

C-COR Singapore PTE Ltd. (liquidated)

C-COR Argentina S.R.L.(dormant)

C-COR Incorporated – China Rep Office

Texscan Corporation, 74-2678034 (Nevada) — dormant

ANTEC International Corporation (Barbados) — dormant

Electronic Connector Corp. of Illinois, 36-3542005 (Illinois)

Power Guard, Inc., 63-1139816 (Illinois) — dormant

ARRIS Korea, Inc., 51-0559046 (Delaware)

ARRIS Korea, Inc. Korea Branch

ARRIS International Netherlands, B.V. (Netherlands)

Communicaciones Broadband S.A. de C.V. (Mexico) — dormant

ANTEC Latin America, Inc., Sucursal Argentina (Argentina) — Branch

ANTEC Do Brasil LTDA (Brasil)

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

ARRIS Group Telecommunicaciones Compania Limited (Chile)

Arris Communications Ireland Limited (Ireland)

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

ARRIS China Rep Office (China)

ARRIS Hong Kong Rep Office (Hong Kong)