EXHIBIT 21.1 INFOUSA INC. AND SUBSIDIARIES SUBSIDIARIES AND STATE OF INCORPORATION infoUSA Marketing, Inc. Delaware CD ROM Technologies, Inc. Delaware infoUSA Inc. Delaware Walter Karl, Inc. New York Donnelley Marketing, Inc. Delaware American Church Lists, Inc. Texas TGMVC Corporation Delaware Strategic Information Management, Inc. Delaware City Directories, Inc. Delaware idEXEC, Inc. Delaware BJ Hunter Information, Inc. Canada List Bazaar.com, Inc. Delaware ClickAction, Inc. Delaware Hill-Donnelly Corporation Delaware TK Database Concepts, Inc. Canada Yesmail, Inc. Delaware Markado, Inc. Delaware IdEXEC UK Limited United Kingdom