Dennys Address: 463 Ragan Rd, Conowingo, MD 21918 Phone: (410) 378-4297 Cuisine: Diner Restaurants, Diner Other Businesses: Dennys at 463 Ragan Rd, Conowingo, MD 21918 Alexander Plumbing Service Inc at 53 Crocus CT, Conowingo, MD 21918 Stone House at 244 Rock Springs Rd, Conowingo, MD 21918