AT&T Inc. is a Delaware-registered American multinational telecommunications holding company headquartered at Whitacre Tower in Downtown Dallas, Texas. It is the world’s largest telecommunications company by revenue and the third largest provider of mobile telephone services in the U.S.
AT&T has several subsidiaries that provide wireless, landline, internet, and TV services. This list provides a brief overview of some of those AT&T subsidiaries.
AT&T subsidiaries List
| No | subsidiaries |
|---|---|
| 1 | Aio Wireless |
| 2 | Ameritech |
| 3 | Ameritech Cellular |
| 4 | Ameritech Interactive Media Services |
| 5 | Ameritech Publishing |
| 6 | AT&T Cybersecurity |
| 7 | AT&T Digital Life |
| 8 | AT&T Internet |
| 9 | AT&T Alascom |
| 10 | AT&T Business Internet |
| 11 | AT&T CallVantage |
| 12 | AT&T Communications |
| 13 | AT&T Computer Systems |
| 14 | AT&T Information Systems |
| 15 | AT&T Laboratories |
| 16 | AT&T Labs |
| 17 | AT&T Mexico |
| 18 | AT&T Mobility |
| 19 | AT&T Technologies |
| 20 | AT&T Wireless Services |
| 21 | Bell System |
| 22 | Bell Telephone Company |
| 23 | BellSouth |
| 24 | BellSouth Advertising & Publishing |
| 25 | BellSouth Long Distance |
| 26 | BellSouth Telecommunications |
| 27 | Centennial Communications |
| 28 | CenturyTel of the Midwest-Kendall |
| 29 | Cricket Wireless |
| 30 | DirecTV |
| 31 | Dobson Cellular |
| 32 | Firstlight Media |
| 33 | Houston Cellular |
| 34 | Illinois Bell |
| 35 | Indiana Bell |
| 36 | International Bell Telephone Company |
| 37 | Leap Wireless |
| 38 | Michigan Bell |
| 39 | Nevada Bell |
| 40 | NorthPoint Communications |
| 41 | Ohio Bell |
| 42 | Pacific Bell |
| 43 | Pacific Bell Directory |
| 44 | Pacific Bell Wireless |
| 45 | Pacific Telesis |
| 46 | Prodigy (online service) |
| 47 | QLT Consumer Lease Services |
| 48 | SBC Long Distance |
| 49 | SBC Telecom |
| 50 | South Central Bell |
| 51 | Southern Bell |
| 52 | Southwestern Bell |
| 53 | Southwestern Bell Internet Services |
| 54 | Southwestern Bell Mobile Systems |
| 55 | Southwestern Bell Yellow Pages |
| 56 | Unefón |
| 57 | Univel |
| 58 | Unix System Laboratories |
| 59 | Vyatta |
| 60 | Wisconsin Bell |
A
- Aio Wireless
- Ameritech
- Ameritech Cellular
- Ameritech Interactive Media Services
- Ameritech Publishing
- AT&T Cybersecurity
- AT&T Digital Life
- AT&T Internet
- AT&T Alascom
- AT&T Business Internet
- AT&T CallVantage
- AT&T Communications
- AT&T Computer Systems
- AT&T Information Systems
- AT&T Laboratories
- AT&T Labs
- AT&T Mexico
- AT&T Mobility
- AT&T Technologies
- AT&T Wireless Services
B
- Bell System
- Bell Telephone Company
- BellSouth
- BellSouth Advertising & Publishing
- BellSouth Long Distance
- BellSouth Telecommunications
C
D
F
H
I
L
M
N
O
P
Q
S
- SBC Long Distance
- SBC Telecom
- South Central Bell
- Southern Bell
- Southwestern Bell
- Southwestern Bell Internet Services
- Southwestern Bell Mobile Systems
- Southwestern Bell Yellow Pages
