301 area code is a telephone area code in the North American Numbering Plan (NANP) for western part of Maryland, United States. The area code was created in 1947 as one of the original area codes assigned.
| Area Code | 301 |
|---|---|
| Major City | Germantown |
| Service Date | 01/01/1947 |
| Time Zone | Eastern |
| Overlay Complex | 227/240/301 |
| Location | Maryland (MD) |
| Country | United States |
Some of the cities served by area code 301 include Germantown, Silver Spring, Waldorf, Frederick, Rockville, Bethesda, Gaithersburg, Bowie and Aspen Hill.
| Area code | City/Town | County |
|---|---|---|
| 301 | Abell | St Marys |
| 301 | Accident | Garrett |
| 301 | Accokeek | Prince George's |
| 301 | Adamstown | Frederick |
| 301 | Andrews Afb | Prince George's |
| 301 | Aquasco | Prince George's |
| 301 | Ashton | Montgomery |
| 301 | Avenue | St Marys |
| 301 | Barnesville | Montgomery |
| 301 | Barton | Allegany |
| 301 | Beallsville | Montgomery |
| 301 | Bel Alton | Charles |
| 301 | Beltsville | Prince George's |
| 301 | Benedict | Charles |
| 301 | Bethesda | Montgomery |
| 301 | Big Pool | Washington |
| 301 | Bittinger | Garrett |
| 301 | Bladensburg | Prince George's |
| 301 | Bloomington | Garrett |
| 301 | Boonsboro | Washington |
| 301 | Bowie | Prince George's |
| 301 | Boyds | Montgomery |
| 301 | Braddock Heights | Frederick |
| 301 | Brandywine | Prince George's |
| 301 | Brentwood | Prince George's |
| 301 | Brinklow | Montgomery |
| 301 | Brookeville | Montgomery |
| 301 | Brownsville | Washington |
| 301 | Brunswick | Frederick |
| 301 | Bryans Road | Charles |
| 301 | Bryantown | Charles |
| 301 | Buckeystown | Frederick |
| 301 | Burkittsville | Frederick |
| 301 | Burtonsville | Montgomery |
| 301 | Bushwood | St Marys |
| 301 | Cabin John | Montgomery |
| 301 | California | St Marys |
| 301 | Callaway | St Marys |
| 301 | Capitol Heights | Prince George's |
| 301 | Cascade | Washington |
| 301 | Cavetown | Washington |
| 301 | Chaptico | St Marys |
| 301 | Charlotte Hall | St Marys |
| 301 | Cheltenham | Prince George's |
| 301 | Chevy Chase | Montgomery |
| 301 | Chewsville | Washington |
| 301 | Clarksburg | Montgomery |
| 301 | Clear Spring | Washington |
| 301 | Clements | St Marys |
| 301 | Clinton | Prince George's |
| 301 | Cobb Island | Charles |
| 301 | College Park | Prince George's |
| 301 | Coltons Point | St Marys |
| 301 | Compton | St Marys |
| 301 | Corriganville | Allegany |
| 301 | Cumberland | Allegany |
| 301 | Damascus | Montgomery |
| 301 | Dameron | St Marys |
| 301 | Derwood | Montgomery |
| 301 | Dickerson | Montgomery |
| 301 | District Heights | Prince George's |
| 301 | Drayden | St Marys |
| 301 | Eckhart Mines | Allegany |
| 301 | Ellerslie | Allegany |
| 301 | Emmitsburg | Frederick |
| 301 | Fairplay | Washington |
| 301 | Faulkner | Charles |
| 301 | Flintstone | Allegany |
| 301 | Fort Washington | Prince George's |
| 301 | Frederick | Frederick |
| 301 | Friendship | Anne Arundel |
| 301 | Friendsville | Garrett |
| 301 | Frostburg | Allegany |
| 301 | Funkstown | Washington |
| 301 | Gaithersburg | Montgomery |
| 301 | Garrett Park | Montgomery |
| 301 | Germantown | Montgomery |
| 301 | Glen Echo | Montgomery |
| 301 | Glenn Dale | Prince George's |
| 301 | Grantsville | Garrett |
| 301 | Great Mills | St Marys |
| 301 | Greenbelt | Prince George's |
| 301 | Hagerstown | Washington |
| 301 | Hancock | Washington |
| 301 | Helen | St Marys |
| 301 | Highland | Howard |
| 301 | Hollywood | St Marys |
| 301 | Hughesville | Charles |
| 301 | Hyattsville | Prince George's |
| 301 | Ijamsville | Frederick |
| 301 | Indian Head | Charles |
| 301 | Ironsides | Charles |
| 301 | Issue | Charles |
| 301 | Jefferson | Frederick |
| 301 | Keedysville | Washington |
| 301 | Kensington | Montgomery |
| 301 | Kitzmiller | Garrett |
| 301 | Knoxville | Frederick |
| 301 | La Plata | Charles |
| 301 | Ladiesburg | Frederick |
| 301 | Lanham | Prince George's |
| 301 | Laurel | Anne Arundel |
| 301 | Leonardtown | St Marys |
| 301 | Lexington Park | St Marys |
| 301 | Libertytown | Frederick |
| 301 | Little Orleans | Allegany |
| 301 | Lonaconing | Allegany |
| 301 | Loveville | St Marys |
| 301 | Luke | Allegany |
| 301 | Marbury | Charles |
| 301 | Maugansville | Washington |
| 301 | Mc Henry | Garrett |
| 301 | Mechanicsville | St Marys |
| 301 | Middletown | Frederick |
| 301 | Midland | Allegany |
| 301 | Midlothian | Allegany |
| 301 | Monrovia | Frederick |
| 301 | Montgomery Village | Montgomery |
| 301 | Morganza | St Marys |
| 301 | Mount Airy | Frederick |
| 301 | Mount Rainier | Prince George's |
| 301 | Mount Savage | Allegany |
| 301 | Mount Victoria | Charles |
| 301 | Myersville | Frederick |
| 301 | Nanjemoy | Charles |
| 301 | New Market | Frederick |
| 301 | New Midway | Frederick |
| 301 | Newburg | Charles |
| 301 | Oakland | Garrett |
| 301 | Oldtown | Allegany |
| 301 | Olney | Montgomery |
| 301 | Owings | Calvert |
| 301 | Oxon Hill | Prince George's |
| 301 | Park Hall | St Marys |
| 301 | Patuxent River | St Marys |
| 301 | Piney Point | St Marys |
| 301 | Pinto | Allegany |
| 301 | Point Of Rocks | Frederick |
| 301 | Pomfret | Charles |
| 301 | Poolesville | Montgomery |
| 301 | Port Tobacco | Charles |
| 301 | Potomac | Montgomery |
| 301 | Rawlings | Allegany |
| 301 | Ridge | St Marys |
| 301 | Riverdale | Prince George's |
| 301 | Rock Point | Charles |
| 301 | Rockville | Montgomery |
| 301 | Rocky Ridge | Frederick |
| 301 | Rohrersville | Washington |
| 301 | Sabillasville | Frederick |
| 301 | Sandy Spring | Montgomery |
| 301 | Scotland | St Marys |
| 301 | Sharpsburg | Washington |
| 301 | Silver Spring | Montgomery |
| 301 | Smithsburg | Washington |
| 301 | Southern MD Facility | Prince George's |
| 301 | Spencerville | Montgomery |
| 301 | Spring Gap | Allegany |
| 301 | St Inigoes | St Marys |
| 301 | St James | Washington |
| 301 | St Marys City | St Marys |
| 301 | Suburb Maryland Fac | Montgomery |
| 301 | Suitland | Prince George's |
| 301 | Swanton | Garrett |
| 301 | Takoma Park | Montgomery |
| 301 | Tall Timbers | St Marys |
| 301 | Temple Hills | Prince George's |
| 301 | Thurmont | Frederick |
| 301 | Tuscarora | Frederick |
| 301 | Unionville | Frederick |
| 301 | Upper Marlboro | Prince George's |
| 301 | Valley Lee | St Marys |
| 301 | Waldorf | Charles |
| 301 | Walkersville | Frederick |
| 301 | Washington Grove | Montgomery |
| 301 | Welcome | Charles |
| 301 | Westernport | Allegany |
| 301 | White Plains | Charles |
| 301 | Williamsport | Washington |
| 301 | Woodsboro | Frederick |