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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: 800-473-7020 option 3
Direct: 908-673-1000 option 3
Fax: 908-673-1189

Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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