| Area Code 240 Details | |
|---|---|
| Country | United States |
| State/Province | Maryland |
| Major City | Baltimore |
| Time Zone | Eastern |
| Prefix | County | Phone Type | Status |
|---|---|---|---|
| 240-477 | Montgomery | Landline | Active |
| 240-478 | Montgomery | Cell Number | Active |
| 240-479 | Prince Georges | Cell Number | Active |
| 240-480 | Montgomery | Cell Number | Active |
| 240-481 | Montgomery | Cell Number | Active |
| 240-482 | Montgomery | Landline | Active |
| 240-483 | Prince Georges | Landline | Active |
| 240-485 | Montgomery | Landline | Active |
| 240-486 | Prince Georges | Cell Number | Active |
| 240-487 | Prince Georges | Landline | Active |
| 240-488 | Garrett | Landline | Active |
| 240-489 | Montgomery | Landline | Active |
| 240-490 | Frederick | Cell Number | Active |
| 240-491 | Prince Georges | Landline | Active |
| 240-492 | Prince Georges | Landline | Active |
| 240-493 | Prince Georges | Landline | Active |
| 240-494 | Prince Georges | Landline | Active |
| 240-495 | Prince Georges | Cell Number | Active |
| 240-497 | Montgomery | Landline | Active |
| 240-498 | Prince Georges | Cell Number | Active |