Exhibit 21.1

Significant Subsidiaries of WESCO International, Inc.

WDC Holding, Inc.

WESCO International, Inc.

WESCO Distribution, Inc.

WESCO Distribution Canada Co.

WESCO Distribution Canada LP

WESCO Equity Corporation

WESCO Finance Corporation

WESCO Receivables Corporation

WESCO Nevada, Ltd.

Communications Supply Corporation

Bruckner Supply Company, Inc.

WDCH, LP

WDINESCO II BV