Receive a local area code
240
You can get a business phone with Area Code 240 for free with Phonely. For less than $60 / Month, you can even equip your phone number with an AI phone receptionist that talks like a human and answeres FAQ's, schedules appointments, routes your calls and so much more.
Economic Overview
The 240 area code region is economically diverse, featuring a strong presence of government agencies, biotechnology firms, healthcare, and education sectors. Major employers include the National Institutes of Health (NIH), Lockheed Martin, Marriott International, and federal government contractors. The area also benefits from its proximity to Washington, D.C., with many residents engaged in professional, scientific, and technical services.
Geographical Overview
Area code 240 serves parts of western and central Maryland, including Montgomery, Prince George’s, Frederick, Charles, and Washington counties. Key cities covered are Rockville, Bethesda, Silver Spring, Gaithersburg, Frederick, and Waldorf. It overlays the same region as area code 301.
Location Info
Area code 240 covers the western and southern suburbs of Washington, D.C., extending from the Capital Beltway through the I-270 corridor and up to the city of Frederick, and further west to Hagerstown. It includes the densely populated areas of Montgomery and Prince George’s counties, as well as more rural and suburban communities to the north and west.
Population Demographics
The 240 area code region is home to a diverse, highly educated, and affluent population, with significant African American, Hispanic, and Asian communities. The area has a high median household income and is known for its mix of suburban families, young professionals, and international residents.
Time Zone Info
Area code 240 is located entirely within the Eastern Time Zone (ET).
Other Area Code Details
Area code 240 was introduced in 1997 as an overlay to 301 to accommodate the rapid growth in the region. The area is known for its proximity to Washington, D.C., vibrant cultural scene, and as a hub for technology and research, particularly in the I-270 "Tech Corridor."
