First Interstate Bank, Helena East Side Branch Basic Info Reviews Routing Numbers Map & Direction Name: First Interstate Bank, Helena East Side Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 2728 Colonial Drive Helena, Montana 59601 Lewis And Clark County View other branches Phone: 406-443-4381 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer092901272YN092901641YN092901683YY102300129YN From: To:
