AT&T, headquartered in Dallas, TX, is the largest mobile phone service and telecommunications, provider. The company is a Fortune 500 Company, ranking 9th<\/sup> in 2020, reporting annual revenue of $181 billion.<\/p>\n\n\n\n
AT&T got its start in 1878 as the American District Telegraph Company in St. Louis, Missouri. It wasn\u2019t until 1920 when the company expanded its services to four US states \u2013 Oklahoma, Kansas, Arkansas, and Texas.<\/p>\n\n\n\n
The expansions were contributed to multiple mergers, which also changed its branding to the Southwestern Bell Telephone Company. At the time, the company was owned by the American Telephone and Telegraph Company that succeeded Alexander Graham Bell\u2019s \u201cBell Telephone Company\u201d.<\/p>\n\n\n\n
Southwestern Bell Company acquired AT&T Corp., its former parent company, in 2005. About a year later, the BellSouth Corporation was acquired by AT&T Inc<\/a>.<\/p>\n\n\n\n