The Bridgehampton National Bank, Southold Branch Basic Info Reviews Routing Numbers Map & Direction Name: The Bridgehampton National Bank, Southold Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 54970 Main Road Southold, New York 11971 Suffolk County View other branches Phone: 631-765-1500 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer021406667YY021413155YY021413935YY021414280YY From: To: