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21 hours ago · AT&T Inc. (with "AT&T" being an abbreviation for its former name, the American Telephone and Telegraph Company) is an American multinational telecommunications holding company headquartered at Whitacre Tower in Downtown Dallas, Texas. [4] It is the world's fourth-largest telecommunications company by revenue and the largest wireless carrier in ...
21 hours ago · Comcast. Comcast Corporation (simply known as Comcast, and formerly known as American Cable Systems and Comcast Holdings ), [note 1] incorporated and headquartered in Philadelphia, is an American multinational telecommunications and media conglomerate. [8] The corporation is the second-largest broadcasting and cable television company in the ...
