Ameritech also provided cable television service in select areas as part of the Americast venture with other phone companies during the 1990s.

This brought great concern to Federal and state regulators, who in turn did not approve the merger until SBC and Ameritech agreed to several conditions to ensure adequate competition.

On January 15, 2006, d.b.a names were again changed to align with SBC's assumption of the AT&T brand identity following its acquisition of AT&T Corp. the previous year, and Ameritech was again renamed, becoming AT&T Teleholdings, Inc.[4] and began doing business as AT&T Midwest.

In 2006, the holding companies Pacific Telesis and Southern New England Telecommunications were legally merged into AT&T Teleholdings.

The Ameritech name was used in the storyline of the U.S. television miniseries Amerika to refer to one of the "sovereign" autonomous regions—Ameritech's regional operating area, the Great Lakes area of North America—that the former United States was divided into in result of the fictional Soviet occupation that is the base premise of the miniseries' plot.