AT&T subsidiaries - How Old Today?

1

Ameritech

1

Pacific_Telesis

3

AT&T_Internet

3

AT&T_Labs

3

AT&T_Mexico

3

AT&T_Mobility

3

BellSouth

3

Cricket_Wireless

3

Illinois_Bell

3

Indiana_Bell

3

Michigan_Bell

3

Ohio_Bell

3

Pacific_Bell

3

Southwestern_Bell

3

Wisconsin_Bell