Bell Telephone headquarters, which eventually became the Whitacre Tower in 1982.

AT&T moved its headquarters to the tower from a location in San Antonio, Texas, in 2008. Mayor of Dallas Tom Leppert said then he hoped AT&T would stay in the central city. Most of the around 700 workers moving to the Whitacre Tower were moved into 17 floors that were being refurbished. In August 2008, AT&T sold