Maryland is home to the 301 area code. Area Code 301 belongs to the US’s 269-three digit telephone area codes, and currently serves around 7,829,000 unique phone numbers and representing approximately 1,947,411 individuals near Silver Spring, Rockville, Hyattsville, Bethesda, and Montgomery Village
The Area code 201 is primarily populated by: Silver Spring, Rockville, Hyattsville, Bethesda, and Montgomery Village
The 301 area code also covers the following cities: Frederick, Laurel, Beltsville, Greenbelt, Waldorf, Hagerstown, Chevy Chase, Capitol Heights, Cumberland, Glenn Dale, Kensington, Oxon Hill, Mount Rainier, Gaithersburg, Bowie, Upper Marlboro, Suitland, Myersville, Lanham, Fort Washington, Temple Hills, Leonardtown, Cabin John, Damascus, College Park, Brandywine, Sandy Spring, Lexington Park, La Plata, Indian Head, Oakland, Clinton, Columbia, Ashton, Poolesville, New Market, Glen Echo, Patuxent River, Frostburg, Mechanicsville, Keedysville, Mount Airy, Bryans Road, Brunswick, Walkersville, Adamstown, Williamsport, Hancock, Clear Spring, Tall Timbers, Baltimore, Odenton, Great Mills, Hollywood, Edgewater, Thurmont, Middletown, Smithsburg, Emmitsburg, North Beach, Hughesville, Westernport, Lonaconing, Mount Savage, Grantsville, Friendsville, Accident, Kitzmiller, Oldtown, Luke, Swanton, Avenue, Bittinger, Cascade, Issue, Nanjemoy, Ridge, Annapolis, Monrovia, and Mc Henry.
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