Cornerstone Bank, Detached Facility Basic Info Reviews Routing Numbers Map & Direction Name: Cornerstone Bank, Detached Facility Main Office: No Service: Limited Service Facility Office Location: 323 Main Street New Town, North Dakota 58763 Mountrail County View other branches Phone: 701-627-4717 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer091300719YY091308371YN091310725YN091310987YN From: To: