| 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 |
|---|---|---|---|
| 301-587 | Takoma Park | Montgomery | Landline |
| 301-871 | Silver Spring | Montgomery | Landline |
| 301-799 | Keedysville | Washington | Landline |
| 301-526 | Silver Spring | Montgomery | Wireless |
| 301-343 | District Heights | Prince Georges | Wireless |
| 301-469 | Potomac | Montgomery | Landline |
| 301-638 | Waldorf | Charles | Landline |
| 301-857 | Clear Spring | Washington | Landline |
| 301-352 | Bowie | Prince Georges | Landline |
| 301-363 | Clarksburg | Montgomery | Landline |
| 301-472 | Mechanicsville | Saint Marys | Landline |
| 301-671 | Hagerstown | Washington | Landline |
| 301-224 | Bethesda | Montgomery | Wireless |
| 301-798 | New Market | Frederick | Landline |
| 301-398 | Rockville | Montgomery | Landline |
| 301-903 | Gaithersburg | Montgomery | Landline |
| 301-236 | Silver Spring | Montgomery | Landline |
| 301-318 | Chevy Chase | Montgomery | Wireless |
| 301-437 | Laurel | Prince Georges | Wireless |
| 301-876 | Cumberland | Allegany | Landline |