Other cities in the 240 area code include: Gaithersburg, Rockville, Bethesda, Kensington, Hagerstown, Odenton, Clinton, Sandy Spring, Montgomery Village, College Park, Crofton, Laurel, Greenbelt, Cumberland, Beltsville, Oxon Hill, Hyattsville, Damascus, Ashton, Glenn Dale, Upper Marlboro, Lexington Park, Great Mills, Ijamsville, Brandywine, Mount Airy, La Plata, Frostburg, Mount Rainier, Thurmont, Brunswick, Walkersville, Temple Hills, Poolesville, Capitol Heights, Middletown, Indian Head, Leonardtown, Smithsburg, Emmitsburg, Adamstown, Hughesville, Williamsport, Chevy Chase, Oakland, Cabin John, Westernport, Myersville, Mechanicsville, Hancock, Lonaconing, Keedysville, Newburg, Mount Savage, Grantsville, Friendsville, Clear Spring, Tall Timbers, Kitzmiller, Friendship, Flintstone, Baltimore, Bittinger, Callaway, Cascade, Nanjemoy, and Ridge.
Columbia is a principal city within the Baltimore metropolitan area, located in Howard County, Maryland. It is a planned community consisting of 10 self-contained villages. It began with the idea that a city could enhance its residents' quality of life. Creator and developer James W. Rouse saw the new community in terms of human values, rather than merely economics and engineering. Opened in 1967, Columbia was intended to not only eliminate the inconveniences of then-current subdivision design, but also eliminate racial, religious, and class segregation. Columbia has consistently ranked in the top ten of CNN Money's Best Places to Live in America. Columbia proper consists only of that territory governed by the Columbia Association, but larger areas are included under its name by the U.S. Postal Service and the Census Bureau. These include several other communities which predate Columbia, including Simpsonville, Atholton, and in the case of the census, part of Clarksville. The census-designated place had a population of 103,683 according to 2013 Census estimates, making it the second most populous community in Maryland after Baltimore.
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. The population density of this CBD area of Silver Spring was 15,600 per square mile all within 360 acres (1.5 km 2) and approximately 2.5 square miles (6 km 2) in the CBD/downtown area. The community has recently undergone a significant renaissance, with the addition of major retail, residential, and office developments.Silver Spring takes its name from a mica -flecked spring discovered there in 1840 by Francis Preston Blair, who subsequently bought much of the surrounding land. Acorn Park, tucked away in an area of south Silver Spring away from the main downtown area, is believed to be the site of the original spring.
The 240 area code lies within the Eastern Daylight Time Zone (or EDT). The current time in Eastern Daylight Time is 2:20 AM on Apr 19, 2021.