AT&T Inc. is an American multinational telecommunications corporation, headquartered at Whitacre Tower in downtown Dallas, Texas.

Operates four businesses. Technology and innovation leader specializing in defense, civil and cybersecurity markets throughout the world.

Verizon Communications Inc., branded as Verizon, is an American broadband and telecommunications company, the largest U.S. wireless communications service provider as of September 2014, and a corporate component of the Dow Jones Industrial Average.