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2. Telephone and Data Systems - Wikipedia

   en.wikipedia.org/wiki/Telephone_and_Data_Systems

   Telephone and Data Systems, Inc. is a Chicago-based telecommunications service company providing wireless products and services; cable and wireline broadband, TV and voice services; and hosted and managed services to approximately 6 million customers nationwide through its business units TDS Telecom and U.S. Cellular (NYSE: USM).

3. Category:Defunct telecommunications companies of the United ...

   en.wikipedia.org/wiki/Category:Defunct...

   Category: Defunct telecommunications companies of the United States. ... American Cable and Radio Corporation; Ameritech; Andrew Corporation; AT&T Communications ...

4. Illinois Technology and Research Corridor - Wikipedia

   en.wikipedia.org/wiki/Illinois_Technology_and...

   The Illinois Technology and Research Corridor is a region of commerce and industry located along Interstate 88 in the Chicago metropolitan area, primarily in Cook, DuPage, Kane, and DeKalb Counties. The corridor is home to the headquarters or regional centers for many Fortune 1000 companies (including many specializing in research, development ...

5. Lightower Fiber Networks - Wikipedia

   en.wikipedia.org/wiki/Lightower_Fiber_Networks

   Lightower Fiber Networks, founded in 2006, was a provider of telecommunications and IT services. It offered cloud computing, colocation hosting, and connectivity. It offered cloud computing, colocation hosting, and connectivity.

6. 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 ...

7. Chicago Heights, Illinois - Wikipedia

   en.wikipedia.org/wiki/Chicago_Heights,_Illinois

   Chicago Heights lies on the high land of the Tinley Moraine, with the higher and older Valparaiso Moraine lying just to the south of the city.. According to the 2021 census gazetteer files, Chicago Heights has a total area of 10.30 square miles (26.68 km 2), of which 10.28 square miles (26.63 km 2) (or 99.87%) is land and 0.01 square miles (0.03 km 2) (or 0.13%) is water.

8. Ameritech - Wikipedia

   en.wikipedia.org/wiki/Ameritech

   AADS was a Tier 1 network Internet Exchange Point in Chicago, Illinois that provided service to higher education and research networks via a program called Star TAP [1] and commercial networks. [2] After the merger with SBC, AADS did business as the SBC Network Access Point or SBC/AADS NAP. Ameritech logo, 1984–1993 Ameritech's final logo ...

9. Frontier North - Wikipedia

   en.wikipedia.org/wiki/Frontier_North

   Contel was acquired by GTE in 1993. [1] Following its acquisition by GTE, Contel North was renamed GTE North, Inc... In 1993, Iowa, Missouri, Minnesota, and Nebraska were split off from GTE North into a new company called GTE Midwest, Inc. ConTel of Illinois, ConTel of Indiana, ConTel of Pennsylvania, and ConTel Quaker State were all merged into GTE North.