EXHIBIT 21.1 CHANDLER (U.S.A.), INC. AND SUBSIDIARIES SUBSIDIARIES OF THE REGISTRANT 1. National American Insurance Company, an Oklahoma corporation that is a wholly owned subsidiary of Chandler USA. 2. Chandler Insurance Managers, Inc., an Oklahoma corporation that is a wholly owned subsidiary of Chandler USA. 3. Network Administrators, Inc., a Texas corporation that is a wholly owned subsidiary of Chandler USA. 4. Chandler Capital Trust I, a Delaware corporation that is a wholly owned subsidiary of Chandler USA. 5. Chandler Capital Trust II, a Delaware corporation that is a wholly owned subsidiary of Chandler USA.