First International Bank & Trust, First International Bank & Trust Basic Info Reviews Routing Numbers Map & Direction Name: First International Bank & Trust, First International Bank & Trust Main Office: No Service: Full Service Brick and Mortar Office Location: 1331 9th Avenue Nw Williston, North Dakota 58801 Williams County View other branches Phone: 480-641-1100 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer091305031YY091311177YN From: To: