Happy State Bank, Downtown Express Bank Basic Info Reviews Routing Numbers Map & Direction Name: Happy State Bank, Downtown Express Bank Main Office: No Service: Full Service Brick and Mortar Office Location: 1000 S. Buchanan Amarillo, Texas 79101 Potter County View other branches Phone: 806-372-2265 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer111017791YN111305115YN111307469YN111310870YY111321144YN111322729YY From: To: