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  2. AT&T - Wikipedia

    en.wikipedia.org/wiki/AT&T

    AT&T Inc. AT&T Inc. is an American multinational telecommunications holding company headquartered at Whitacre Tower in Downtown Dallas, Texas. [ 4] It is the world's third-largest telecommunications company by revenue and the second-largest wireless carrier in the United States behind Verizon but ahead of T-Mobile. [ 5]

  3. History of AT&T - Wikipedia

    en.wikipedia.org/wiki/History_of_AT&T

    History of AT&T. The history of AT&T dates back to the invention of the telephone. The Bell Telephone Company was established in 1877 by Alexander Graham Bell, who obtained the first US patent for the telephone, and his father-in-law, Gardiner Greene Hubbard. Bell and Hubbard also established American Telephone and Telegraph Company in 1885 ...

  4. AT&T Corporation - Wikipedia

    en.wikipedia.org/wiki/AT&T_Corporation

    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.

  5. Directory assistance - Wikipedia

    en.wikipedia.org/wiki/Directory_assistance

    Companies requested to have their toll-free number listed, and paid the providers each time their phone number was released to a toll-free directory-assistance caller. In 1999, AT&T applied for permission to discontinue this service, [2] but it remained active until the summer of 2020. An automated disconnection recording now plays when you ...

  6. AT&T hacked? Data breach of phone security exposes texts ...

    www.aol.com/t-hacked-data-breach-phone-130431430...

    AT&T announced a data breach of phone security for nearly all cellular customers on Friday, July 12, 2024. ... Call and text records identify the phone numbers with which an AT&T number interacted ...

  7. Telephone directory - Wikipedia

    en.wikipedia.org/wiki/Telephone_directory

    A telephone directory, commonly called a telephone book, telephone address book, phonebook, or the white and yellow pages, is a listing of telephone subscribers in a geographical area or subscribers to services provided by the organization that publishes the directory. Its purpose is to allow the telephone number of a subscriber identified by ...

  8. AT&T Michigan Headquarters - Wikipedia

    en.wikipedia.org/wiki/AT&T_Michigan_Headquarters

    The AT&T Building (formerly known as the SBC Building, the Ameritech Building and the Michigan Bell Building) was completed for the Michigan Bell Telephone Company in 1919 [1] and expanded in 1928. It is located at 1365 Cass Avenue, and occupies the block bordered by First Street, Cass Avenue, State Street, and Michigan Avenue .

  9. Category:AT&T subsidiaries - Wikipedia

    en.wikipedia.org/wiki/Category:AT&T_subsidiaries

    Aio Wireless. Ameritech. Ameritech Cellular. Ameritech Interactive Media Services. Ameritech Publishing. AT&T Business Internet. AT&T Communications. AT&T Alascom. AT&T CallVantage.

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