AT&T BusinessDirect® In accordance with FCC Regulations, to register your account for AT&T Business Direct® you must obtain a Registration Code at: https://www.businessdirect.att.com/portal/smallbusiness/sruserregister.jsp?fromSBC=true . Once you have a valid Registration Code, you can register your account at: https://www.businessdirect.att.com/portal/smallbusiness/validateRC.jsp.