DNB First, Lionville Branch Basic Info Reviews Routing Numbers Map & Direction Name: DNB First, Lionville Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 891 N. Pottstown Pike Exton, Pennsylvania 19341 Chester County View other branches Phone: 610-363-7590 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer031908074YY036076215YY From: To: