| 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 |
|---|---|---|---|
| 301-237 | Laurel | Prince Georges | Wireless |
| 301-939 | Laurel | Anne Arundel | Landline |
| 301-761 | Silver Spring | Montgomery | Landline |
| 301-688 | Laurel | Anne Arundel | Landline |
| 301-698 | Frederick | Frederick | Landline |
| 301-850 | Bowie | Prince Georges | Landline |
| 301-418 | Frederick | Frederick | Landline |
| 301-990 | Gaithersburg | Montgomery | Landline |
| 301-902 | Silver Spring | Montgomery | Landline |
| 301-390 | Bowie | Prince Georges | Landline |
| 301-912 | Odenton | Anne Arundel | Landline |
| 301-373 | Loveville | Saint Marys | Landline |
| 301-428 | Gaithersburg | Montgomery | Landline |
| 301-699 | Riverdale | Prince Georges | Landline |
| 301-667 | Myersville | Frederick | Wireless |
| 301-681 | Silver Spring | Montgomery | Landline |
| 301-978 | Gaithersburg | Montgomery | Landline |
| 301-809 | Bowie | Prince Georges | Landline |
| 301-984 | Rockville | Montgomery | Landline |
| 301-703 | Mount Airy | Frederick | Landline |