AT&T Mobility, formerly known as Cingular Wireless, is a wholly owned subsidiary of AT&T that provides wireless services to 128.6 million subscribers in the United States including Puerto Rico and the U.S. Virgin Islands. AT&T Mobility is the second largest wireless telecommunications provider in the United States and Puerto Rico behind Verizon Wireless. AT&T Mobility is headquartered in the Lenox Park area of Brookhaven, Georgia, just outside Atlanta.