Ameritech
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Website. http://www.att.com. 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.
Address: 225 West Randolph Street. Chicago Illinois 60606. U.S.A. Telephone: (312) 727-9411. Fax: (312) 207-1601. Statistics: Wholly Owned Subsidiary of Ameritech Corporation. Incorporated: 1881. Employees: 15,678. Revenues: $3.28 billion. SICs: 4813 Telephone Communications, Except Radiotelephone. Company History:
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.
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.
Oct 9, 2013 · Learn how telephones changed Chicago from 1893 to present, including the role of Illinois Bell and area codes. See photos and sources of Chicago telephone history booklist.
Oct 8, 2013 · Learn how telephones, introduced by Alexander Graham Bell, transformed Chicago and Illinois in the late 19th century. Find out about the history, service, and impact of Illinois Bell, the dominant telephone company in the area.
