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 Strategic Information Management, Inc. Delaware Donnelley Marketing, Inc. Delaware American Church Lists, Inc. Texas City Directories, Inc. Delaware idEXEC, Inc. Delaware BJ Hunter Information, Inc. Canada Business CreditUSA.com, Inc. Delaware List Bazaar.com, Inc. Delaware 63