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AT&T Corporation, originally the American Telephone and Telegraph Company, is the subsidiary of AT&T Inc. that provides voice, video, data, and Internet telecommunications and professional services to businesses, consumers, and government agencies. During the Bell System 's long history, AT&T was at times the world's largest telephone company, the world's largest cable television operator, and a regulated monopoly.
AT&T Corporation, formerly (1899–1994) American Telephone and Telegraph Company, American corporation that provides long-distance telephone and other telecommunications services. It is a descendant of the American Telephone and Telegraph Company, which built much of the United States’ long-distance and local telephone networks, becoming the world’s largest corporation and a standard for the telecommunications industry.
Investor Profile. 1 "Standalone AT&T” results represent AT&T’s continuing operations and exclude U.S. Video operations and other dispositions. See Form 8-K dated October 20, 2022. | 2 Represents total Capital Investment, on a consolidated basis, including acquisitions of spectrum and wireless operations from 2017 to 2021 | 3 Includes dividends and buybacks from 2017-2021 | 4 Based on nationwide GWS drive test data.
After the closing of the acquisition, AT&T Corp. became a wholly owned subsidiary of SBC. In recognition of the global importance of the AT&T name, SBC changed its corporate name to AT&T Inc. The acquisition was completed on Nov. 18, 2005. For additional details on former AT&T Corp. stock events, please click here.
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It is the world's largest telecommunications company by revenue and the third largest provider of mobile telephone services in the U.S.   As of 2022, AT&T was ranked 13th on the Fortune 500 rankings of the largest United States corporations, with revenues of $168.8 billion. 
AT&T Labs Unlocks Power of Open, Disaggregated Design Mike Satterlee, VP of Network Core Infrastructure Services, discusses how our open, disaggregated platforms helped speed up 5G, fiber rollout and services.