Operasi Korporat | |
| Syarikat induk: | |
| Syarikat Operasi Bell: | Bell Telephone Company of Nevada · The Bell Telephone Company of Pennsylvania · The Chesapeake & Potomac Telephone Company · The Chesapeake & Potomac Telephone Company of Maryland · The Chesapeake & Potomac Telephone Company of West Virginia · The Chesapeake & Potomac Telephone Company of Virginia · Diamond State Telephone · Illinois Bell · Indiana Bell · Michigan Bell · Mountain Bell · New England Telephone & Telegraph · New Jersey Bell · New York Telephone · Northwestern Bell · Ohio Bell · Pacific Northwest Bell · Pacific Telephone · South Central Bell · Southern Bell · Southwestern Bell · Wisconsin Telephone |
| Pemegang francais: | |
Anak syarikat AT&T yang lain | |
| Perkilangan: | |
| Operasi R&D: | |
| Perkhidmatan Jarak Jauh: | |
| Perkhidmatan Wayarles: | |
| Harta intelektual (logo, dll.) | |
