Exhibit 21.1

LIST OF SUBSIDIARIES OF REGENCY ENERGY PARTNERS LP

All subsidiaries are wholly owned, directly or indirectly by Regency Energy Partners LP as of February 28, 2009.

• Regency OLP GP LLC

• Regency Energy Finance Corp.

• Regency Gas Services LP

• Regency Intrastate Gas LLC

• Regency Liquids Pipeline LLC

• Regency Gas Marketing LLC

• Gulf States Transmission Corporation

• Regency Field Services LLC

• Regency Gas Utility LLC

• Pueblo Holdings Inc.

• Pueblo Midstream Gas Corporation

• Regency Oil Pipeline LLC

• CDM Resource Management LLC

• FrontStreet Hugoton, LLC

• Regency NX, LLC

• WGP-KHC, LLC