AT&T Inc. (NYSE: T) is the largest provider of local, long distance telephone services in the United States, and also serves digital subscriber line Internet access. AT&T is the second largest provider of wireless service in the United States, with over 77 million wireless customers, and more than 150 million total customers.^[3] AT&T, Inc. was formed in 2005, when "Baby Bell" SBC Communications Inc. purchased former "Ma Bell" AT&T Corporation The newly merged company took on the iconic AT&T moniker and T stock-trading symbol (for "telephone").