The economy in the 240 area code region is heavily influenced by its proximity to the nation's capital and the presence of numerous federal agencies, contractors, and technology companies. Major industries include biotechnology, healthcare, information technology, and professional services. The region is home to several major employers such as the National Institutes of Health, Lockheed Martin, and Marriott International.
Area code 240 serves the Maryland suburbs of Washington D.C., including cities like Rockville, Gaithersburg, Germantown, Bethesda, Potomac, and Silver Spring. It also covers parts of Frederick County such as Urbana and Monrovia. Neighboring area codes include 301 (Hagerstown, Frederick), 410 (Baltimore, Annapolis), and 202/703 (Washington D.C.).
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Area code 240 covers parts of central and northwestern Maryland, including most of Montgomery County and a small portion of Frederick County. It neighbors area codes 301 (western Maryland), 410 (Baltimore and eastern Maryland), and 202/703 (Washington D.C. metro area).
The region covered by area code 240 has a population of over 1 million people, with a diverse mix of urban, suburban, and rural communities. Montgomery County is one of the most affluent and highly educated counties in the United States, with a median household income of over $100,000 and a large population of professionals working in the Washington D.C. metro area.
Area code 240 is located in the Eastern Time Zone (ET), which is 5 hours behind Coordinated Universal Time (UTC-5).
The 240 area code region is known for its diverse communities, excellent public schools, and high quality of life. It is also home to several notable attractions, including the National Museum of Health and Medicine, the Glenstone Museum, and the Chesapeake & Ohio Canal National Historical Park.
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