| Area Code 240 Details | |
|---|---|
| Country | United States |
| State/Province | Maryland |
| Major City | Baltimore |
| Time Zone | Eastern |
| Prefix | County | Phone Type | Status |
|---|---|---|---|
| 240-522 | Allegany | Cell Number | Active |
| 240-523 | Charles | Landline | Active |
| 240-524 | Prince Georges | Landline | Active |
| 240-525 | Prince Georges | Landline | Active |
| 240-526 | Saint Marys | Landline | Active |
| 240-527 | Washington | Landline | Active |
| 240-528 | Charles | Landline | Active |
| 240-529 | Frederick | Landline | Active |
| 240-530 | Charles | Landline | Active |
| 240-532 | Prince Georges | Cell Number | Active |
| 240-533 | Prince Georges | Landline | Active |
| 240-535 | Montgomery | Cell Number | Active |
| 240-536 | Montgomery | Landline | Active |
| 240-538 | Saint Marys | Landline | Active |
| 240-539 | Prince Georges | Landline | Active |
| 240-541 | Montgomery | Cell Number | Active |
| 240-542 | Prince Georges | Landline | Active |
| 240-543 | Montgomery | Cell Number | Active |
| 240-544 | Prince Georges | Landline | Active |
| 240-545 | Prince Georges | Landline | Active |