240 Area Code - Location, Time, Map, Cities and Census Data - ZIP-Codes.com
https://www.zip-codes.com/area-code/area-code-240.asp
WEBMar 1, 2024 · Area Code 240 is located in Maryland. It covers 110 cities, including Baltimore, Columbia, Waldorf, Silver Spring, and Frederick. It also covers 12 counties, including Montgomery County, Prince Georges County, Frederick County, Charles County, and Howard County.
DA: 68 PA: 69 MOZ Rank: 90 Up or Down: Up