How do i contact ntt data business solutions? Please contact NTT DATA Business Solutions directly at +1-888-956-2086 or through one of our many offices in the United States, Canada and India.How do i contact ntntt usa? NTT America, Inc. New York Head Office 757 Third Avenue, 14th Floor, New York, NY 10017, U.S.A. TEL: +1-212-661-0810 FAX: +1-212-661-1078 https://hello.global.ntt. Chicago Office 1700 E. Golf Road, Suite #1100, Schaumburg, IL 60173, U.S.A. TEL: +1-888-341-7867 FAX: +1-773-693-7749 https://hello.global.ntt. Dallas OfficeWhere is the head office of ntt communications? NTT Communications Corporation. Global Head Office. OTEMACHI PLACE WEST TOWER 2-3-1 Otemachi, Chiyoda-ku, Tokyo 100-8019, Japan. TEL: +81-3-6700-3000. Americas. North America. NTT America, Inc. New York Head Office. 757 Third Avenue, 14th Floor, New York, NY 10017, U.S.A.What is ntntt ltd? NTT Ltd. is a global technology services company bringing together the expertise of leaders in the field, including NTT Communications, Dimension Data, and NTT Security. We partner with organizations around the world to shape and achieve outcomes through intelligent technology solutions.