Exhibit 21.1

SUBSIDIARIES OF COTERRA ENERGY INC.

Cimarex Energy Co.

Cimarex Energy of Colorado

Cimarex Gas Gathering, Inc.

Cimarex Resolute LLC

Cody Energy LLC

GasSearch Drilling Services Corporation

Key Production Company, Inc.

Magnum Hunter Production, Inc.

Oklahoma Gas Processing, Inc.

Prize Energy Resources Inc.

Resolute Natural Resources Company, LLC

Resolute Natural Resources Southwest, LLC