EX-21 10 ex21.htm SUBSIDIARIES OF AT&T, INC. ex21.htm
Exhibit 21
PRINCIPAL SUBSIDIARIES OF

AT&T INC., AS OF DECEMBER 31, 2010

2010 AT&T INC. REPORT TO STOCKHOLDERS

SECURITIES AND EXCHANGE COMMISSION ("SEC")

FORM 10-K filed February 25, 2011

 
 
 
Legal Name
 
State of Incorporation/Formation
 
Conducts Business Under
 
Illinois Bell Telephone
Company
Illinois
AT&T Illinois;
AT&T Wholesale
Indiana Bell Telephone
Company, Incorporated
Indiana
AT&T Indiana;
AT&T Wholesale
Michigan Bell
Telephone Company
Michigan
AT&T Michigan;
AT&T Wholesale
Nevada Bell
Telephone Company
Nevada
AT&T Nevada;
AT&T Wholesale
Pacific Bell
Telephone Company
California
AT&T California;
AT&T Wholesale;
AT&T DataComm
 
AT&T International, Inc.
Delaware
AT&T International
SBC Internet Services, Inc.
California
AT&T Internet Services;
AT&T Entertainment Services
SBC Long Distance, LLC
Delaware
AT&T Long Distance
AT&T Teleholdings, Inc.
Delaware
AT&T Midwest;
AT&T West;
AT&T East
 
Southwestern Bell
Telephone Company
Missouri
AT&T Arkansas; AT&T Kansas;
AT&T Missouri; AT&T Oklahoma;
AT&T Texas; AT&T Southwest;
AT&T DataComm; AT&T Wholesale
 
Southwestern Bell
Yellow Pages, Inc.
Missouri
AT&T Advertising  Solutions
 
The Ohio Bell
Telephone Company
 
Ohio
 
AT&T Ohio;
AT&T Wholesale
 
The Southern New
England Telephone Company
 
Connecticut
 
AT&T Connecticut;
AT&T Woodbury
 
Wisconsin Bell, Inc.
 
Wisconsin
 
AT&T Wisconsin;
AT&T Wholesale
 

 
 
 


 
  Legal Name
 
State of Incorporation/Formation
 
Conducts Business Under
 
AT&T Corp.
New York
AT&T Corp.; AT&T;
ACC Business; AT&T Wholesale;
Lucky Dog Phone Co.; SmarTalk;
ConQuest; CQTalk!;
AT&T Business Solutions;
AT&T Advanced Solutions
 
AT&T Communications of California, Inc.
California
same
AT&T Communications of the Mountain States, Inc.
Colorado
Conquest; SmarTalk;CQTalk!;
 
AT&T Communications of NJ, L.P.
 
Delaware
 
same
 
 
AT&T Communications of New York, Inc.
New York
 
same
 
AT&T Communications of Illinois,
Inc. 
Illinois
 
SmarTalk; ConQuest; Lucky Dog Phone Co.;
 ACC Business
AT&T Communications of the Southern States, LLC
 
 
Delaware
 
 
 
 
 
ACC Business; SmarTalk;
AT&T; Conquest; CQTalk!;
Lucky Dog Phone Co.
 
Teleport Communications New York
New York
same
BellSouth Corporation
Georgia
AT&T South
 
BellSouth Telecommunications, Inc.
 
Georgia
 
AT&T Southeast
AT&T Alabama
AT&T Florida
AT&T Georgia
AT&T Kentucky
AT&T Louisiana
AT&T Mississippi
AT&T North Carolina
AT&T South Carolina
AT&T Tennessee
 
 
 



 
 
 

 

  Legal Name
State of Incorporation/Formation
Conducts Business Under
 
AT&T Mobility LLC
Delaware
AT&T Mobility
AT&T Mobility II, LLC
Delaware
AT&T Mobility
New Cingular Wireless Services, Inc.
Delaware
AT&T Mobility