Old Second National Bank Address: 7050 Burroughs Ave, Plano, IL 60545 Phone: (630) 327-7172 Banks Other Businesses: Old Second National Bank at 6800 W US Highway 34, Plano, IL 60545 BMO Harris Bank at 2005 West Route 34, Plano, IL 60545 Castle Bank at 505 W US Highway 34, Plano, IL 60545 Centrue Bank at 15 W South St, Plano, IL 60545