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  2. Franklin Center (Chicago) - Wikipedia

    en.wikipedia.org/wiki/Franklin_Center_(Chicago)

    Franklin Center is a 60-story supertall skyscraper in the Loop neighborhood of downtown Chicago, completed in 1989 as the AT&T Corporate Center. It is the 6th tallest building in Chicago and the 23rd tallest in the United States, with office and retail space and a 350-space garage.

  3. Illinois Bell - Wikipedia

    en.wikipedia.org/wiki/Illinois_Bell

    Illinois Bell is the Bell Operating Company serving Illinois and Indiana. It is owned by AT&T and offers local telephone service. Learn about its history, products, and mergers with other telecommunications companies.

  4. AT&T Corporation - Wikipedia

    en.wikipedia.org/wiki/AT&T_Corporation

    AT&T Corporation was an American telecommunications company that provided voice, video, data, and Internet services. It was formerly known as the American Telephone and Telegraph Company, or AT&T, and was a monopoly until its breakup in 1984.

  5. Ameritech - Wikipedia

    en.wikipedia.org/wiki/Ameritech

    Ameritech was one of the seven Regional Bell Operating Companies created after the 1984 AT&T divestiture. It merged with SBC Communications in 1999 and became part of AT&T in 2006.

  6. Western Electric - Wikipedia

    en.wikipedia.org/wiki/Western_Electric

    The Western Electric Company was an American electrical engineering and manufacturing company that operated from 1869 to 1996. A subsidiary of the AT&T Corporation for most of its lifespan, Western Electric was the primary manufacturer, supplier, and purchasing agent for all telephone equipment for the Bell System from 1881 until 1984, when the Bell System was dismantled.

  7. Ameritech Cellular - Wikipedia

    en.wikipedia.org/wiki/Ameritech_Cellular

    Ameritech Cellular was the first company in the US to provide cellular phone service to the public in 1983. It was a division of Ameritech, a holding company of several Bell operating companies, and later became part of AT&T Mobility after mergers and acquisitions.

  8. Breakup of the Bell System - Wikipedia

    en.wikipedia.org/wiki/Breakup_of_the_Bell_System

    The Bell System was a monopoly of local telephone service in the U.S. that was broken up by a 1982 antitrust lawsuit. The breakup created seven independent regional companies, reduced AT&T's size and influence, and increased competition in the long-distance market.

  9. Directory assistance - Wikipedia

    en.wikipedia.org/wiki/Directory_assistance

    Directory assistance or 411 is a phone service to find out a specific telephone number and/or address of a residence, business, or government entity. Learn how to use 411 in different areas, billing methods, data sources, and alternative services in the U.S. and Canada.

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