AT&T

AT&T Inc.is the largest provider of local and long distance telephone services in the United States, and also sells digital subscriber line Internet access and digital television service. AT&T is the second largest provider of wireless service in the United States, with over 81.6 million wireless customers, and more than 150 million total customers. AT&T Inc. was formed in 1983 as SBC Communications Inc. In 2005, AT&T converted to its current form when it purchased the former "Ma Bell" AT&T Corporation. The newly merged company took on the iconic AT&T moniker and T stock-trading symbol (for "telephone").

The current AT&T includes eleven of the original Bell Operating Companies, and the original long distance division. While it reconstitutes much of the former Bell System, AT&T Inc. lacks the vertical integration of the historic AT&T Corp., which prompted United States v. AT&T, the antitrust suit that led to the breakup in 1984 (which was ultimately settled by the Modification of Final Judgment in 1982).

The company is headquartered in downtown Dallas, Texas.