In recent history, the company was known as SBC Communications after the government break-up of the original AT&T in 1983.
SBC purchased AT&T in 2005 and took on their brand, logo and marketing for the entire company.
In 2006, the company acquired BellSouth.
In 2008, the AT&T corporate office moved from San Antonio to Dallas.
There have been many recent acquisitions including Cellular One, Centennial Communications, Wayport Inc. and Qualcomm.
AT&T is currently the largest provider of fixed and mobile telephone services in the US. The company current serves over 100 million mobile customers.