1 Exhibit 21 RESTRICTED SUBSIDIARIES OF HARTE-HANKS , INC. As of March 31, 1999 State of Name of Corporation Organization % Owned - ------------------- ------------ ------- DiMark, Inc. New Jersey 100% DiMark Marketing, Inc. Pennsylvania 100%(1) Direct Market Concepts, Inc. Florida 100% DMK, Inc. Delaware 100%(2) The Flyer Publishing Corporation Florida 100% Harte-Hanks Data Technologies, Inc. Massachusetts 100% Harte-Hanks Delaware, Inc. Delaware 100% Harte-Hanks Direct, Inc. Delaware 100% Harte-Hanks Direct Marketing/Baltimore, Inc. Maryland 100% Harte-Hanks Direct Marketing/Cincinnati, Inc. Ohio 100% Harte-Hanks Direct Marketing/Dallas, Inc. Delaware 100% Harte-Hanks Direct Marketing/Fullerton, Inc. California 100% Harte-Hanks do Brazil Consultoria e Servicos Ltda. Brazil 100%(3) Harte-Hanks Limited England 100%(3) Harte-Hanks Market Research, Inc. New Jersey 100% Harte-Hanks Partnership, Ltd. Texas 100%(6) Harte-Hanks Pty. Limited Australia 100%(3) Harte-Hanks Response Management/Austin, Inc. Delaware 100% Harte-Hanks Response Management/Boston, Inc. Massachusetts 100% Harte-Hanks Response Management Call Centers, Inc. Delaware 100% Harte-Hanks Response Management Europe Belgium 100% Harte-Hanks Shoppers, Inc. California 100% Harte-Hanks Stock Plan, Inc. Delaware 100% H&R Communications, Inc. New Jersey 100%(2) HTS, Inc. Connecticut 100% Information for Marketing Limited (shell corporation) England 100%(5) Marketing Communications, Inc. Missouri 100% Mars Graphic Services, Inc. New Jersey 100%(4) NSO, Inc. Ohio 100% Printing Management Services, Inc. Delaware 100% PRO Direct Response Corp. New Jersey 100%(2) Southern Comprint Co. California 100% Spectral Resources, Inc. New York 100% (1) Owned by Mars Graphic Services, Inc. (2) Owned by DiMark Marketing, Inc. (3) Owned by Harte-Hanks Data Technologies, Inc. (4) Owned by DiMark, Inc. (5) Owned by Harte-Hanks Limited (6) 99.5% Owned by Harte-Hanks Delaware, Inc. .5% Owned by Harte-Hanks, Inc.