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2. AT&T - Wikipedia

   en.wikipedia.org/wiki/AT&T

   AT&T Inc., simply known as AT&T, an abbreviation for its former name, the American Telephone and Telegraph Company, 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 ...

3. Telephone directory - Wikipedia

   en.wikipedia.org/wiki/Telephone_directory

   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 ...

4. Directory assistance - Wikipedia

   en.wikipedia.org/wiki/Directory_assistance

   Toll-free directory assistance was provided by telecommunication providers, namely AT&T and Verizon, as mandated by the Federal Communications Commission. 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.

5. Telephone exchange names - Wikipedia

   en.wikipedia.org/wiki/Telephone_exchange_names

   Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]

6. Southwestern Bell - Wikipedia

   en.wikipedia.org/wiki/Southwestern_Bell

   Southwestern Bell. Southwestern Bell Telephone Company, LLC is a wholly owned subsidiary of AT&T. It does business as other d.b.a. names in its operating region, which includes Arkansas, Kansas, Missouri, Oklahoma, Texas, and portions of Illinois. The company is currently headquartered in Dallas, Texas at One AT&T Plaza.

7. History of AT&T - Wikipedia

   en.wikipedia.org/wiki/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, which acquired the ...