First Bank, Arnold Facility Basic Info Reviews Routing Numbers Map & Direction Name: First Bank, Arnold Facility Main Office: No Service: Full Service Brick and Mortar Office Location: 3850 Jeffco Boulevard Arnold, Missouri 63010 Jefferson County View other branches Phone: 636-464-3600 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer063114946YN081005794YN081009428YY081205109YN081205455YN121137506YN122239131YN From: To: