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.............................. Ameritech
Logo and Trademark..............................
Ameritech Corporation (originally American Information Technologies Corporation) was a U.S. telecommunications company that arose out of the 1984 AT&T divestiture. Ameritech was one of seven Regional Bell Operating Companies divested. For Ameritech's first nine years, it maintained these Bell brands inherited from the Bell System -- though public displays of the Bell companies' names were often captioned "An Ameritech Company". In January 1993, Ameritech officially retired the Bell brands and marketed itself with solely the Ameritech name across all five states in its territory. It added "d/b/a Ameritech (state)" to the names of its Bells to communicate brand unity.
Ameritech also owned Ameritech Cellular, a wireless company that operated cellular networks in many of the major cities of these states. Ameritech Cellular was previously called Ameritech Mobile Communications.
Prior to its merger with SBC Communications, Ameritech's corporate headquarters were in a leased space above the Chicago Mercantile Exchange on floors 34 through 39 of 30 S Wacker Dr, Chicago IL. Further corporate offices were located at 225 W Randolph St, Chicago IL (formerly "The Illinois Bell Building") and 1 Ameritech Center Dr, Hoffman Estates IL ("The Ameritech Center"). It was traded on the NYSE under the "AIT" symbol.
On January 15, 2003, SBC Communications changed its d/b/a names, and then changed the legal name of Ameritech Corp. to SBC Teleholdings, Inc., and would begin doing business as SBC Midwest. On January 15, 2006, AT&T changed its d/b/a names, and Ameritech was again renamed, becoming AT&T Teleholdings, Inc. and began doing business as AT&T Midwest.
Several Ameritech subsidiaries remain legally named "Ameritech", such as Ameritech Advanced Services; however, they do business as "AT&T Advanced Solutions".
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