1st Interstate Bank Services - Financial WHERE TO FIND US firstinterstatebank.com/ 119 6th Ave SE WHEN TO FIND US Monday: Open 8:00 am - 5:30 pm Tuesday: Open 8:00 am - 5:30 pm Wednesday: Open 8:00 am - 5:30 pm Thursday: Open 8:00 am - 5:30 pm Friday: Open 8:00 am - 5:30 pm Saturday: Closed Sunday: Closed HOW TO CONNECT (605) 229-2634