AT&T is a US telecommunications company with their head office in Dallas, Texas. Founded in 1983, over the years AT&T managed to complete a number of acquisitions and joined forces with Southwestern Bell Telephone Company, Pacific Bell Telephone Company and others. AT&T is the biggest global supplier of pay TV, and its IP network brings together six continents. In 2016 the company was named the 17th largest mobile telecommunications operator in the world. A special division, AT&T Labs, is engaged in the innovative development and has already won eight Nobel Prizes. The company’s shares are traded on the New York Stock Exchange.