Exhibit 22.1

LIST OF ISSUER AND GUARANTOR SUBSIDIARIES

The following subsidiaries of CDW Corporation serve as an issuer or guarantor, as applicable, for each outstanding series of senior notes:

Subsidiary

Jurisdiction of Organization

Type of Obligor

CDW LLC

Illinois

Issuer

CDW Finance Corporation

Delaware

Issuer

CDW Technologies LLC

Wisconsin

Guarantor

CDW Direct, LLC

Illinois

Guarantor

CDW Government LLC

Illinois

Guarantor

CDW Logistics LLC

Illinois

Guarantor