SONABANK, Upper Marlboro Branch Basic Info Reviews Routing Numbers Map & Direction Name: SONABANK, Upper Marlboro Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 14804 Pratt Street Upper Marlboro, Maryland 20772 Prince George's County View other branches Phone: 301-627-3504 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer051409278YY055003421YN055073448YN056073599YN255072582YN From: To: