EXHIBIT 21.1 SUBSIDIARIES OF FAIR, ISAAC AND COMPANY, INCORPORATED Name of Company and Jurisdiction of Name under which it Incorporation or Does Business Organization ======================================== =================== Fair, Isaac International Corporation(1) California DynaMark, Inc.(1) Minnesota Fair, Isaac International Germany Corporation(2) California Fair, Isaac International Canada Corporation(2) California Fair, Isaac International UK Corporation(2) California Fair, Isaac International Japan Corporation(2) California Fair, Isaac International Ltd(2) England Fair, Isaac International France Corporation(2) California Fair, Isaac International Mexico Corporation(2) California Fair, Isaac International, S. A.(3) Monaco (1) 100% owned by Fair, Isaac and Company, Incorporated. (2) 100% owned by Fair, Isaac International Corporation. (3) 100% owned by Fair, Isaac International Corporation except for qualifying shares.