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AT&T Inc. () is the largest provider of both local and long distance telephone services, wireless service under the brand Cingular Wireless, and DSL Internet access in the United States. The current AT&T, which is based in San Antonio, Texas, United States, is the rechristened name of SBC Communications, following the purchase of its former parent company, AT&T Corp. As a part of the merger, SBC shed its name and took on the iconic AT&T moniker and the T stock-trading symbol (for "telephone") . Although the corporation is considered SBC renamed, most of its major subsidiaries were part of AT&T prior to 1984, including the Bell Operating Companies and the long distance division.[1] However, AT&T lacks the vertical integration it once had, which had been the reason for the anti-trust suits that led to the 1984 breakup and the accusations of monopoly associated with the Bell System divestiture.