The region covered by area code 301 has a strong and diverse economy, with major industries including biotechnology, aerospace, information technology, and federal government services. Major employers include the National Institutes of Health, Fort Detrick, and numerous government contractors and technology companies.
Area code 301 serves western and central Maryland, including the cities of Frederick, Germantown, Gaithersburg, Rockville, and Silver Spring. It covers parts of Montgomery County, Frederick County, Washington County, as well as overlapping with neighboring area codes 240 (Montgomery County), 202 (Washington D.C.), 703 (Northern Virginia), 304 (Eastern West Virginia), and 717 (South Central Pennsylvania).
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Area code 301 covers western and central Maryland, including the cities of Frederick and Germantown. It borders area codes 240, 202, 703, 304, and 717, spanning parts of Montgomery, Frederick, and Washington counties in Maryland, as well as minor overlaps with Virginia and Pennsylvania.
The 301 area code serves a diverse population of over 1.5 million residents, with a mix of urban, suburban, and rural communities. Major cities include Frederick, Germantown, Gaithersburg, Rockville, and Silver Spring. The region is known for its strong economy, highly educated workforce, and proximity to major metropolitan areas.
The 301 area code is located in the Eastern Time Zone (ET) and observes Daylight Saving Time (DST).
Area code 301 is home to several historic sites and attractions, including the Antietam National Battlefield, the Chesapeake and Ohio Canal National Historical Park, and the Frederick Historic District. The region is also known for its picturesque countryside, wineries, and outdoor recreation opportunities.
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