EXHIBIT 21.1 TOM BROWN, INC. Subsidiaries of Registrant December 31, 2001 Jurisdiction of Percent Name of Subsidiary Incorporation/Organization Of Ownership - ------------------ -------------------------- ------------ Retex Inc. Wyoming 100% Rocno Corporation Texas 100% Sauer Drilling Company Delaware 100% TBI West Virginia, Inc. Delaware 100% TBI Pipeline Company Delaware 100% Tom Brown Resources Ltd. Alberta 100% TBI Field Services, Inc. Delaware 100% TCP Gathering Co. Colorado 100%