Locations for Area Code - 410

Area code 410 serves eastern Maryland, including Baltimore, Annapolis, and the Eastern Shore. Created in 1991 from a split with 301, it was the first new area code in Maryland in decades and was later overlaid with 443 and 667. Ten-digit dialing is required. The area includes the state’s largest city (Baltimore), the state capital (Annapolis), and a wide range of economic sectors including shipping, medicine, government, and education. Area code 410 has become emblematic of Maryland’s diversity—geographically, culturally, and economically—representing both Chesapeake Bay communities and vibrant urban life.