Area Code 240 Details

State : Maryland
Major City : Gaithersburg
Timezone : Eastern

240 is the North American telephone area code for the state of Maryland, including the cities of Aspen Hill, Bethesda, Bowie, Chillum, Clinton, College Park, Cumberland, Fairland, Fort Washington, Frederick, Gaithersburg, Germantown, Greenbelt, Hagerstown, Landover, Montgomery Village, North Bethesda, North Laurel, North Potomac, Olney, Oxon Hill-glassmanor, Potomac, Rockville, Silver Spring, South Laurel, St. Charles, Suitland, Waldorf, Wheaton-glenmont, and White Oak.

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Prefix Primary City Company County Usage
240-200-#### Mount Rainier, MD Bandwidth.com Clec Unknown
240-201-#### Ridge, MD Global Naps South Saint Mary's Landline
240-205-#### Rockville, MD New Cingular Wireless PCS - DC Montgomery Cell Number
240-206-#### Glenn Dale, MD Xo Maryland Prince George's Landline
240-207-#### Damascus, MD Cavalier East LLC Montgomery Landline
240-208-#### La Plata, MD Global Naps South Charles Landline
240-209-#### Indian Head, MD Global Naps South Charles Landline
240-210-#### Waldorf, MD New Cingular Wireless PCS - DC Charles Cell Number
240-212-#### Oakland, MD Core Communications Garrett Landline
240-213-#### Waldorf, MD Global Naps South Charles Landline
240-214-#### Mechanicsville, MD Global Naps South Saint Mary's Landline
240-215-#### Frederick, MD Telcove Operations Frederick Landline
240-216-#### Waldorf, MD Nextel Communications Charles Cell Number
240-217-#### Hagerstown, MD Omnipoint Communications Cap Operations Washington Cell Number
240-218-#### Nanjemoy, MD Global Naps South Charles Landline
240-219-#### Newburg, MD Global Naps South Charles Landline
240-220-#### Poolesville, MD Global Naps South Montgomery Landline
240-221-#### Rockville, MD Verizon Maryland Montgomery Landline
240-222-#### Waldorf, MD Cavalier Telephone Mid-atlantic Charles Landline
240-223-#### Mount Rainier, MD Allegiance Telecom Prince George's Landline
240-224-#### Prince George's Cell Number
240-225-#### Frederick, MD Core Communications Frederick Landline
240-228-#### Laurel, MD Verizon Maryland Prince George's Landline
240-229-#### Waldorf, MD Broadwing Communications. LLC Charles Landline
240-230-#### Hughesville, MD Global Crossing Local Services-md Charles Landline
240-231-#### Hagerstown, MD Core Communications Washington Landline
240-232-#### Mount Rainier, MD Broadwing Communications. LLC Prince George's Landline
240-233-#### Newburg, MD Teleport Communications Group - DC Charles Landline
240-234-#### Montgomery Cell Number
240-235-#### Bethesda, MD Paetec Communications Montgomery Landline
240-236-#### Frederick, MD Verizon Maryland Frederick Landline
240-237-#### Callaway, MD Teleport Communications Group - DC Saint Mary's Landline
240-238-#### Rockville, MD Paetec Communications Montgomery Landline
240-239-#### Leonardtown, MD Core Communications Saint Mary's Landline
240-241-#### Chevy Chase, MD Starpower Communications Prince George's Landline
240-242-#### Kensington, MD Starpower Communications Montgomery Landline
240-243-#### Gaithersburg, MD Allegiance Telecom Montgomery Landline
240-244-#### Mount Rainier, MD Starpower Communications Prince George's Landline
240-245-#### Glenn Dale, MD Starpower Communications Prince George's Landline
240-246-#### Gaithersburg, MD Starpower Communications Montgomery Landline
240-247-#### Mount Rainier, MD Allegiance Telecom Prince George's Landline
240-248-#### Ridge, MD Global Naps South Saint Mary's Landline
240-249-#### Mechanicsville, MD Teleport Communications Group - DC Saint Mary's Landline
240-250-#### Brandywine, MD Global Naps South Prince George's Landline
240-251-#### Highfield, MD Core Communications Washington Landline
240-252-#### Gaithersburg, MD Level 3 Communications Montgomery Landline
240-253-#### Mount Rainier, MD Global Crossing Local Services-md Prince George's Landline
240-254-#### Hughesville, MD Teleport Communications Group - DC Charles Landline
240-255-#### Poolesville, MD Global Naps South Montgomery Landline
240-256-#### Leonardtown, MD Teleport Communications Group - DC Saint Mary's Landline
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