Former Bank of the Cascades Clients:
If you haven’t already, be sure to update the phone number for First Interstate Bank’s Client Contact Center (1-855-342-3400). The phone numbers previously used to access Bank of the Cascades’ Customer Support Center will not work as of March 6, 2018.
Category: Personal Service: Credit Cards | Updated: September 30th, 2015
First Interstate Bank
PO Box 31615
Billings, MT 59107
ACH Payments: Set up through your local branch or our customer service line toll free at 1-888-833-3454 option #3.
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