Multinational Support Diners Club organizations around the world understand the complexities and unique requirements of managing a travel and expense program. We all make uncompromising customer service our hallmark. No matter what country you're in, or where your Cards have been issued, we'll provide you and your travelers with superior customer service and support to meet all your business travel needs. Diners Club Support Contact information and support procedures for U.S. based organizations and Cardmembers Diners Club International Customer Service A comprehensive listing of nearly every Diners Club customer service numbers on earth, in over 70 countries around the world Diners Club International - Local Home Pages Get to know us - explore the homepages of Diners Club organizations around the world