EXHIBIT 21.1

SUBSIDIARIES OF ATLAS ENERGY, INC.

Name		Jurisdiction
Atlas America, LLC		Pennsylvania
Crown Drilling of Pennsylvania, LLC		Pennsylvania
AED Investments, Inc.		Delaware
Atlas America Mid-Continent, Inc.		Delaware
Atlas Resource Pennsylvania, Inc.		Delaware
Atlas Energy Management, Inc.		Delaware
Atlas Energy Resources, LLC		Delaware
Atlas Energy Operating Company, LLC		Delaware
Atlas Noble, LLC		Delaware
AER Pipeline Construction, Inc.		Delaware
Viking Resources, LLC		Pennsylvania
Atlas Energy Tennessee, LLC		Pennsylvania
Atlas Energy Indiana, LLC		Indiana
Atlas Energy, LLC		Pennsylvania
AIC, LLC		Delaware
Atlas Energy Ohio, LLC		Ohio
Atlas Resources, LLC		Pennsylvania
Anthem Securities, Inc.		Pennsylvania
Resource Energy, LLC		Delaware
Resource Well Services, LLC		Delaware
REI-NY, LLC		Delaware
Atlas Lightfoot, LLC		Delaware
Atlas Energy Finance Corp.		Delaware
Atlas Energy Michigan, LLC		Delaware
Atlas Gas & Oil Company, LLC		Michigan
Westside Pipeline Company, LLC		Michigan
Atlas Pipeline Holdings GP, LLC		Delaware
Atlas Pipeline Holdings, L.P.		Delaware
Atlas Pipeline Holdings II, LLC		Delaware
Atlas Pipeline Partners GP, LLC		Delaware
Atlas Pipeline Partners, L. P.		Delaware
Atlas Pipeline Operating Partnership, L.P.		Delaware
Atlas Pipeline Acquisition, LLC		Delaware
Atlas Pipeline Tennessee, LLC		Pennsylvania
Atlas Pipeline Mid-Continent LLC		Delaware
Saddleback Pipeline, LLC		Delaware
Atlas Pipeline Mid-Continent KansOK, LLC		Delaware
Elk City Oklahoma Pipeline, L.P.		Texas
Elk City Oklahoma GP, LLC		Delaware
ECOP Gas Company, LLC		Delaware
Atlas Pipeline Finance Corp.		Delaware
NOARK Energy Services, LLC		Oklahoma
Atlas Midkiff, LLC		Delaware
Atlas Chaney Dell, LLC		Delaware
Atlas Pipeline Mid-Continent WestTex, LLC		Delaware
Atlas Pipeline Mid-Continent WestOk, LLC		Delaware
Setting Sun Pipeline Corporation		Delaware
Anadarko Midkiff/Chaney Dell, LLC		Delaware
Atlas Pipeline Laurel Mountain, LLC		Delaware