| General Information about Area Code 301 | |
|---|---|
| Country | United States |
| State / Province / Territory | Maryland |
| Major City | Rockville |
| Time Zone | Eastern (UTC-05:00) |
| Prefix | Primary City | County | Phone Type |
|---|---|---|---|
| 301-560 | Brentwood | Prince Georges | Landline |
| 301-884 | Mechanicsville | Saint Marys | Landline |
| 301-293 | Myersville | Frederick | Landline |
| 301-874 | Frederick | Frederick | Landline |
| 301-314 | Hyattsville | Prince Georges | Landline |
| 301-307 | Greenbelt | Prince Georges | Landline |
| 301-431 | Silver Spring | Montgomery | Landline |
| 301-730 | Myersville | Frederick | Wireless |
| 301-495 | Takoma Park | Montgomery | Landline |
| 301-290 | Mechanicsville | Saint Marys | Landline |
| 301-806 | Laurel | Prince Georges | Wireless |
| 301-596 | Columbia | Howard | Landline |
| 301-922 | Silver Spring | Montgomery | Wireless |
| 301-538 | Chevy Chase | Montgomery | Wireless |
| 301-702 | Suitland | Prince Georges | Landline |
| 301-391 | Damascus | Montgomery | Landline |
| 301-637 | Rockville | Montgomery | Landline |
| 301-206 | Laurel | Anne Arundel | Landline |
| 301-636 | Hyattsville | Prince Georges | Landline |
| 301-566 | Laurel | Prince Georges | Wireless |