AT&T Member since December 1996 Technology & IT Services Contact details for AT&T John Heffernan (800) 750-2355 JH3412@att.com John Heffernan att.com 1452 Edinger Ave. Rm 1140, Tustin, CA 92780 Telecommunications AT&T Information Telecommunications Send a Message FacebookThis field is for validation purposes and should be left unchanged.First Name*Last Name*Email* Your message*
