AT&T Inc., an abbreviation of its predecessor's original name, the American Telephone and Telegraph Company, is an American multinational telecommunications conglomerate headquartered at the Whitacre Tower in Downtown Dallas, Texas. AT&T is the world’s fourth-largest telecommunications company by revenue, the third largest wireless carrier in the United States behind T-Mobile and Verizon, and the nation's biggest fiber internet provider. On the New York Stock Exchange, AT&T trades under the ticker symbol “T, ” and has a market capitalization of $186.83 billion. On the Fortune 500 AT&T ranked 37th among the largest American businesses and reported revenues of $125.6 billion last year. AT&T has over 240 million subscribers worldwide, and its operations are split into two main segments: Communications, which offers wireless services, broadband options, and business solutions, along with Latin America, which provides wireless networking in Mexico. Even after spinning off DirecTV, AT&T still offers bundling deals with it. Wikipedia