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Phone support is available:
Monday - Thursday: 8 a.m. - 6 p.m. EST
Friday: 8 a.m. - 4:30 p.m. EST
Telephone: +1 3462060468
Sunday 6:00 p.m. - Friday 4:15 p.m. ET
This excludes end-of-day processing hours (Monday – Thursday, 5:00 p.m. - 6:00 p.m.) and holiday hours.
North American Derivatives Exchange, Inc.
200 West Jackson Blvd.
Chicago, IL 60606