Other cities in the 301 area code include: College Park, Laurel, Greenbelt, Cumberland, Bladensburg, La Plata, Frostburg, Mount Rainier, Thurmont, Brunswick, Walkersville, District Heights, Poolesville, Middletown, Mount Airy, Indian Head, Boonsboro, Emmitsburg, Chevy Chase, Smithsburg, Kensington, Williamsport, North Beach, Oakland, Westernport, Myersville, Ridgely, Hancock, Keedysville, Lonaconing, Garrett Park, Grantsville, New Market, Friendsville, Barton, Clear Spring, Accident, Kitzmiller, Glen Echo, Barnesville, Burkittsville, Brookeville, and Luke.
Silver Spring is an unincorporated community and census-designated place (CDP) in Montgomery County, Maryland, United States. It had a population of 76,716 according to 2013 estimates by the United States Census Bureau, making it the fourth most populous place in Maryland, after Baltimore, Columbia, and Germantown. The urbanized, oldest, and southernmost part of Silver Spring is a major business hub that lies at the north apex of Washington, D.C. As of 2004, the Central Business District (CBD) held 7,254,729 square feet (673,986 m 2) of office space, 5216 dwelling units and 17.6 acres (71,000 m 2) of parkland.
Hyattsville is a city in Prince George's County, Maryland, and also a close, urban suburb of Washington, D.C. The population was 17,557 at the 2010 United States Census.
Rockville is a city located in the central region of Montgomery County, Maryland. It is the county seat and is a major incorporated city of Montgomery County and forms part of the Baltimore–Washington metropolitan area. The 2010 census tabulated Rockville's population at 61,209, making it the third largest incorporated city in Maryland, behind Baltimore and Frederick. Rockville is the largest incorporated city in Montgomery County, Maryland, although the nearby census-designated place of Germantown is more populous.
The 301 area code lies within the Eastern Daylight Time Zone (or EDT). The current time in EDT is 4:12 AM on Jul 07, 2020.