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Customer Service

Telephone customer service is available between 9:00am and 5:00pm Eastern Time Zone. Customer service can be reached by mail, phone, fax, or e-mail:

MARQUIS WHO'S WHO Customer Service
430 Mountain Avenue, Suite 400
New Providence, NJ 07974

Toll-Free: 800-394-6946 option 2
Direct: 908-673-0100 option 2
Fax: 908-673-1189