Savings Institute Bank and Trust Company, Stonington Branch Basic Info Reviews Routing Numbers Map & Direction Name: Savings Institute Bank and Trust Company, Stonington Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 80 Stonington Road Mystic, Connecticut 06355 New London County View other branches Phone: 860-535-4716 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer011104283YN011501598YN211174181YY211174301YN211572615YN From: To: