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1. en.wikipedia.org › wiki › AT&TAT&T - Wikipedia

   en.wikipedia.org › wiki › AT&T

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   23 hours ago · AT&T Inc. 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 the United States. [5] As of 2023, AT&T was ranked 13th on the Fortune 500 rankings of the largest ...