| 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 |
|---|---|---|---|
| 301-578 | Takoma Park | Montgomery | Landline |
| 301-957 | Laurel | Howard | Landline |
| 301-752 | Waldorf | Charles | Wireless |
| 301-564 | Bethesda | Montgomery | Landline |
| 301-571 | Bethesda | Montgomery | Landline |
| 301-386 | Hyattsville | Prince Georges | Landline |
| 301-670 | Gaithersburg | Montgomery | Landline |
| 301-987 | Gaithersburg | Montgomery | Landline |
| 301-663 | Frederick | Frederick | Landline |
| 301-238 | Suitland | Prince Georges | Landline |
| 301-905 | Silver Spring | Montgomery | Landline |
| 301-402 | Bethesda | Montgomery | Landline |
| 301-459 | Hyattsville | Prince Georges | Landline |
| 301-894 | Suitland | Prince Georges | Landline |
| 301-767 | Potomac | Montgomery | Landline |
| 301-764 | Waldorf | Charles | Landline |
| 301-915 | Chevy Chase | Montgomery | Landline |
| 301-598 | Silver Spring | Montgomery | Landline |
| 301-625 | Silver Spring | Montgomery | Landline |
| 301-741 | Laurel | Howard | Landline |