DNB First, Old City Branch Basic Info Reviews Routing Numbers Map & Direction Name: DNB First, Old City Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 36 N 3rd Street Philadelphia, Pennsylvania 19106 Philadelphia County View other branches Phone: 215-923-4860 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer031908074YY036076215YY From: To: