AT&T Corporation
 AT&T Corporation's logo used from 1983 until 1999. | |
 AT&T Corporation's former headquarters at 550 Madison Avenue in New York City | |
| Formerly | American Telephone and Telegraph Company (1885–1994) |
|---|---|
| Company type | Public |
| NYSE: T | |
| Industry | Telecommunications |
| Predecessor | American Bell |
| Founded | March 3, 1885 in New York City, United States |
| Founder | Theodore Newton Vail |
| Defunct | May 1, 2024 |
| Fate | Acquired by SBC Communications |
| Successor | AT&T |
| Headquarters | , United States |
Area served | United States |
| Products | Telephone services Long-distance calling Internet services |
| Parent | American Bell (1885–1899) AT&T (2005-2024) |
| Subsidiaries | AT&T Communications |
AT&T Corporation, commonly referred to as AT&T, an abbreviation for its former name, the American Telephone and Telegraph Company, was an American telecommunications company that provided voice, video, data, and Internet telecommunications and professional services to businesses, consumers, and government agencies.