EX-10.Y 4 ex-21ye2023.htm EX-10.Y AMENDED AND RESTATED CREDIT AGREEMENT Document

Exhibit 21
 
PRINCIPAL SUBSIDIARIES OF

AT&T INC., AS OF DECEMBER 31, 2023

2023 AT&T INC. REPORT TO STOCKHOLDERS

SECURITIES AND EXCHANGE COMMISSION ("SEC")

FORM 10-K filed February 23, 2024

Legal NameState of Incorporation/FormationConducts Business Under
Illinois Bell Telephone
  Company, LLC
 
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 Teleholdings, Inc.Delaware
AT&T Midwest;
AT&T West;
AT&T East
 
Southwestern Bell
  Telephone Company
Delaware
AT&T Arkansas; AT&T Kansas;
AT&T Missouri; AT&T Oklahoma;
AT&T Texas; AT&T Southwest;
AT&T DataComm; AT&T Wholesale
 
The Ohio Bell
  Telephone Company
Ohio
AT&T Ohio;
AT&T Wholesale
 
Wisconsin Bell, Inc.Wisconsin
AT&T Wisconsin;
AT&T Wholesale
 
AT&T Services, Inc.Delaware
AT&T Services;
AT&T Labs


AT&T Corp.New York
AT&T Corp.; ACC Business;
AT&T Wholesale;
AT&T Business Solutions;
AT&T Advanced Solutions;
AT&T Diversified Group;
AT&T Mobile and Business Solutions 
Teleport Communications
  America, LLC
Delawaresame
BellSouth Telecommunications,
  LLC
Georgia
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
AT&T Southeast
AT&T Mobility LLCDelawaresame
AT&T Mobility II LLCDelawaresame
New Cingular Wireless
  PCS, LLC
Delaware
AT&T Mobility
Cricket Wireless LLCsame
AT&T Comunicaciones Digitales, S. de R.L. de C.V.Mexico Citysame
AT&T MVPD Group Holdings, LLCDelawaresame