EXHIBIT 21.1

SUBSIDIARIES OF XTO ENERGY INC.

	Jurisdiction of Incorporation
XTO Barnett LLC	Delaware
X Landmark LLC	Texas
XTO Resources I GP, LLC	Delaware
XTO Resources I LP, LLC	Delaware
XTO Resources I, LP	Texas
Barnett Gathering, LP	Texas
Cross Timbers Energy Services, Inc.	Texas
Cross Timbers Trading Company	Texas
Ringwood Gathering Company	Delaware
Timberland Gathering & Processing Company, Inc.	Texas
WTW Properties, Inc.	Texas
Trend Gathering & Treating, LP (formed in January 2006)	Texas