Ameritech
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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.
Illinois Bell Telephone Company is the legal name of what has generally been known as Ameritech Illinois since 1993. The firm is the largest provider of local telephone service in the state, and recently has been at the forefront of new technologies such as fiber optics and digital switching.
After federal courts dismantled AT&T's Bell system in 1984, Illinois Bell became the largest division of Ameritech, the new, leading telecommunications company in the Midwest. At the end of the 1990s, when it employed about 20,000 people in the Chicago area and collected nearly $20 billion in annual revenues, Ameritech was purchased by SBC ...
The Bell Telephone Company was the initial corporate entity from which the Bell System originated to build a continental conglomerate and monopoly in telecommunication services in the United States and Canada.
Following the Bell breakup, Illinois Bell became part of Ameritech, which, in 1999, was acquired by SBC Communications, a telecommunications firm based in San Antonio, Texas. The first half century of telephony in Chicago was a period of rapid, and, indeed, often extraordinary growth.
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.
Illinois Bell Telephone Company is the legal name of what has generally been known as Ameritech Illinois since 1993. The firm is the largest provider of local telephone service in the state, and recently has been at the forefront of new technologies such as fiber optics and digital switching.
