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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.
Learn about the origins, growth, and innovations of Illinois Bell, the largest local telephone provider in Illinois. Find out how it became part of Ameritech and then AT&T, and what services it offers today.
Learn about the history of Illinois Bell Telephone Co., a phone company that served the Chicago area from 1878 to 2000. Find out how it evolved from a local company to a regional and national giant, and how it changed after the breakup of AT&T.
- Illinois Bell Telephone Co.
The Illinois Bell Telephone Company is a Bell System internet and telephone telecommunications group in the Midwestern state of Illinois. The network does business as AT&T Illinois under AT&T Teleholdings (which was once Ameritech). [1] It was established in 1920.
The Bell System was a system of telecommunication companies, led by the Bell Telephone Company and later by the American Telephone and Telegraph Company (AT&T), that dominated the telephone services industry in North America for over 100 years from its creation in 1877 until its antitrust breakup in 1983.
Learn about the history and services of Illinois Bell, the largest local telephone provider in Illinois. Find out how it evolved from a Chicago-based company to a statewide utility and a subsidiary of Ameritech Corporation.
Learn about the history of telephony in Chicago, from the invention of the telephone by Alexander Graham Bell to the breakup of AT&T in 1984. Find out how Illinois Bell, a Bell System company, became part of SBC Communications in 1999.
