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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.
Illinois Bell is the Bell Operating Company serving Illinois and Indiana. It was founded in 1881 as American Bell, became part of AT&T in 1983, and merged with SBC in 1999.
UScellular is an American mobile network operator and the fifth-largest wireless carrier in the US. It was founded in 1983, operates in 21 states, and plans to sell its wireless business to T-Mobile US in 2025.
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.
Learn about the history and usage of telephone exchange names or central office names, which were assigned to switching systems in different localities. Find out how they were dialed, displayed, and replaced by numeric systems in various countries.
Learn about the origins, monopoly, and breakup of AT&T, the American Telephone and Telegraph Company. AT&T was the primary telephone company in the US from 1885 to 1982, when it was split into regional and long-distance providers.
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.
Lucent Technologies was a telecommunications equipment company that spun off from AT&T in 1996 and merged with Alcatel in 2006. It was known for its Bell Labs innovations, its stock market success, and its logo controversy.
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