The American Telephone and Telegram Company was founded on March 3rd, 1885 in New York City, New York. Its industry is telecommunications and its headquarters is in Bedminster, New Jersey. Since 2005, it has been owned by AT&T, Inc.


Bell Patent Association (1874-1877)

Bell Telephone Company (1877-1879)

National Bell Telephone Company (1879-1880)

American Bell Telephone Company (1880-1885)

American Telephone and Telegram Company (1885-2005)

AT&T Corporation (2005-)


Bell System (1899-1984)

Bell Telephone Laboratories (1925-1996)

Bell Telephone Company of Canada (1880-1975)

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