DTCC Hotlines and Customer Support Numbers Hotlines Customer Service 1.888.382.2721 (U.S. and Canada) 1.212.855.8099 (International) Relationship Management 1.800.422.0582 (U.S. and Canada) DTCC Main Number DTCC Main # 1.212.855.1000 (International) Corporate Communications Corporate Communications 1.212.855.5471