Maryland, the Old Line State, offers a microcosm of America with its mountains, beaches, bustling cities, and historical landmarks. Baltimore and Annapolis showcase maritime heritage and colonial architecture, while the Chesapeake Bay provides natural beauty and a vibrant seafood economy.

Maryland’s telecom infrastructure started with area code 301, which once covered the entire state. To manage increasing demand, 410 was added for the eastern region, including Baltimore, followed by overlays like 443 and 667. Meanwhile, area code 240 overlays 301 in western Maryland and the D.C. suburbs. These Maryland area codes reflect dense development, especially around Washington, D.C., while also serving historic coastal towns and rural countryside with reliable telecommunications access.