Exhibit 21 The seven registrants, Entergy Corporation, System Energy Resources, Inc., Arkansas Power & Light Company, Gulf States Utilities Company, Louisiana Power & Light Company, Mississippi Power & Light Company and New Orleans Public Service Inc., and their active subsidiaries, are listed below: State or Other Jurisdiction of Incorporation Entergy Corporation Delaware System Energy Resources, Inc. (a) Arkansas Arkansas Power & Light Company (a) Arkansas The Arklahoma Corporation (b) Arkansas Gulf States Utilities Company (a) Texas Varibus Corporation (c) Texas GSG&T, Inc. (c) Texas Southern Gulf Railway Company (c) Texas Prudential Oil & Gas, Inc.(c) Texas Louisiana Power & Light Company (a) Louisiana Mississippi Power & Light Company (a) Mississippi New Orleans Public Service Inc. (a) Louisiana System Fuels, Inc.(d) Louisiana Entergy Services, Inc. (a) Delaware Entergy Power, Inc. (a) Delaware Entergy Operations, Inc. (a) Delaware Entergy Enterprises, Inc. (a) Louisiana Entergy, S.A. (a) Argentina Entergy Argentina, S.A. (a) Argentina Entergy Transener, S.A. (a) Argentina Entergy Transener, S.A., LTD. (a) Cayman Islands Entergy Power Development Corporation (a) Delaware Entergy Richmond Power Corporation (e) Delaware Entergy Systems and Service, Inc. (f) Delaware Entergy Pakistan, LTD. (a) Delaware Entergy Power Asia, LTD. (a) Cayman Islands Entergy SASI (a) Delaware _______________________ (a) Entergy Corporation owns all of the Common Stock of System Energy Resources, Inc., Arkansas Power & Light Company, Gulf States Utilities Company, Louisiana Power & Light Company, Mississippi Power & Light Company, New Orleans Public Service Inc., Entergy Services, Inc., Entergy Power, Inc., Entergy Operations, Inc., Entergy Enterprises, Inc., Entergy, S.A., Entergy Argentina, S.A., Entergy Transener, S.A., Entergy Transener, S.A., LDT., Entergy Power Development Corporation, Entergy Pakistan, LTD., Entergy Power Asia, LTD., and Entergy SASI. (b) Arkansas Power & Light Company owns 34% of the Common Stock of The Arklahoma Corporation. (c) Gulf States Utilities Company owns all of the Common Stock of Varibus Corporation, GSG&T, Inc., Southern Gulf Railway Company, and Prudential Oil & Gas, Inc. (d) The capital stock of System Fuels, Inc. is owned in proportions of 35%, 33%, 19% and 13% by Arkansas Power & Light Company, Louisiana Power & Light Company, Mississippi Power & Light Company and New Orleans Public Service Inc., respectively. (e) Entergy Power Development Corporation owns all of the Common Stock of Entergy Richmond Power Corporation. (f) Entergy Enterprises, Inc. owns all of the Common Stock of Entergy Systems and Service, Inc.