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  2. Ameritech - Wikipedia

    en.wikipedia.org/wiki/Ameritech

    Ameritech. AT&T Teleholdings, Inc., formerly known as Ameritech Corporation (and before that American Information Technologies Corporation ), is an American telecommunications company that arose out of the 1984 AT&T divestiture. Ameritech was one of the seven Regional Bell Operating Companies created following the breakup of the Bell System.

  3. Ameritech Cellular - Wikipedia

    en.wikipedia.org/wiki/Ameritech_Cellular

    Ameritech Mobile Communications, LLC was the first company in the United States to provide cellular mobile phone service to the general public. Cell service became publicly available in Chicago on October 13, 1983. The company was a division of Ameritech which, as of January 1, 1984, was the holding company of Illinois Bell, Michigan Bell ...

  4. Illinois Bell - Wikipedia

    en.wikipedia.org/wiki/Illinois_Bell

    Illinois Bell Telephone Company, LLC is the Bell Operating Company serving Illinois. It is owned by AT&T through AT&T Teleholdings, formerly Ameritech. Their headquarters are at 225 West Randolph St., Chicago, IL. After the 1984 Bell System Divestiture, Illinois Bell became a part of Ameritech, one of the 7 original Regional Bell Operating ...

  5. United States Cellular Corporation - Wikipedia

    en.wikipedia.org/wiki/United_States_Cellular...

    US$133 million (2019) Number of employees. 4,800 (1Q 2023) Parent. Telephone and Data Systems (84%) Website. www .uscellular .com. United States Cellular Corporation ( doing business as UScellular and formerly known as U.S. Cellular) is an American mobile network operator. It is a subsidiary of Telephone and Data Systems Inc. (which owns an 84% ...

  6. Franklin Center (Chicago) - Wikipedia

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

    The Franklin Center is a 60-story supertall skyscraper in the Loop neighborhood of downtown Chicago.Completed in 1989 as the AT&T Corporate Center to consolidate the central region headquarters of the American Telephone & Telegraph Company (AT&T), it stands at a height of 1,007 ft (307 m) and contains 1.7 million sq ft (160,000 m 2) of floor space.

  7. Alltel - Wikipedia

    en.wikipedia.org/wiki/Alltel

    Alltel was a landline, wireless and general telecommunications services provider, primarily based in the United States. Before its wireless division was acquired by Verizon Wireless and AT&T, Alltel provided cellular service to 34 states and had approximately 13 million subscribers. As a regulatory condition of the acquisition by Verizon, a ...

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