| 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 |
|---|---|---|---|
| 301-409 | College Park | Prince Georges | Wireless |
| 301-500 | Bethesda | Montgomery | Landline |
| 301-609 | Port Tobacco | Charles | Landline |
| 301-847 | Silver Spring | Montgomery | Landline |
| 301-687 | Frostburg | Allegany | Landline |
| 301-971 | Temple Hills | Prince Georges | Landline |
| 301-303 | College Park | Prince Georges | Wireless |
| 301-787 | Silver Spring | Montgomery | Wireless |
| 301-204 | Chevy Chase | Montgomery | Wireless |
| 301-370 | Gaithersburg | Montgomery | Wireless |
| 301-473 | Frederick | Frederick | Landline |
| 301-802 | Silver Spring | Montgomery | Wireless |
| 301-965 | Mount Rainier | Prince Georges | Landline |
| 301-593 | Silver Spring | Montgomery | Landline |
| 301-748 | Frederick | Frederick | Wireless |
| 301-487 | Myersville | Frederick | Landline |
| 301-853 | Takoma Park | Montgomery | Landline |
| 301-361 | Laurel | Prince Georges | Landline |
| 301-448 | Silver Spring | Montgomery | Landline |
| 301-610 | Rockville | Montgomery | Landline |