| 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 |
|---|---|---|---|
| 301-858 | Bowie | Prince Georges | Landline |
| 301-676 | Frederick | Frederick | Wireless |
| 301-945 | Mount Rainier | Prince Georges | Landline |
| 301-356 | Laurel | Howard | Landline |
| 301-393 | Hagerstown | Washington | Landline |
| 301-949 | Silver Spring | Montgomery | Landline |
| 301-286 | College Park | Prince Georges | Landline |
| 301-718 | Bethesda | Montgomery | Landline |
| 301-930 | Takoma Park | Montgomery | Wireless |
| 301-870 | Waldorf | Charles | Landline |
| 301-791 | Hagerstown | Washington | Landline |
| 301-388 | Silver Spring | Montgomery | Landline |
| 301-470 | Laurel | Anne Arundel | Landline |
| 301-989 | Silver Spring | Montgomery | Landline |
| 301-298 | Upper Marlboro | Prince Georges | Landline |
| 301-350 | Hyattsville | Prince Georges | Landline |
| 301-881 | Rockville | Montgomery | Landline |
| 301-514 | Frederick | Frederick | Wireless |
| 301-342 | Patuxent River | Saint Marys | Landline |
| 301-336 | Hyattsville | Prince Georges | Landline |