First Interstate Bank Branch Location:Branch Name: CASPER MILLS BRANCHAddress: 300 Sw Wyoming BlvdMills, Wyoming 82644CASPER MILLS BRANCH Phone Number: (307) 235-4448 CASPER MILLS BRANCH Details Main Institution’s Name: First Interstate Bank City the headquarters is located: Billings First Interstate Bank Assets:$30,920,570 Headquarters in the USA? Yes Branch Number: 57 Address: 300 Sw Wyoming Blvd City: Mills State: WY ZIP code: 82644 State or Federal Charter: STATE County … Read more