First NBC Bank, Brownswitch Branch Basic Info Reviews Routing Numbers Map & Direction Name: First NBC Bank, Brownswitch Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 740 Brownswitch Road Slidell, Louisiana 70458 St. Tammany County View other branches Phone: 985-265-1000 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer063206139YN065005435YY065401505YN065405378YN265070516YN265070736YN From: To: