| Area Code 240 Details | |
|---|---|
| Country | United States |
| State/Province | Maryland |
| Major City | Baltimore |
| Time Zone | Eastern |
| Prefix | County | Phone Type | Status |
|---|---|---|---|
| 240-577 | Saint Marys | Cell Number | Active |
| 240-578 | Frederick | Cell Number | Active |
| 240-580 | Allegany | Cell Number | Active |
| 240-581 | Prince Georges | Landline | Active |
| 240-582 | Prince Georges | Landline | Active |
| 240-583 | Prince Georges | Landline | Active |
| 240-585 | Charles | Cell Number | Active |
| 240-586 | Frederick | Landline | Active |
| 240-587 | Saint Marys | Cell Number | Active |
| 240-593 | Prince Georges | Cell Number | Active |
| 240-595 | Montgomery | Cell Number | Active |
| 240-597 | Montgomery | Landline | Active |
| 240-599 | Montgomery | Landline | Active |
| 240-600 | Prince Georges | Cell Number | Active |
| 240-601 | Prince Georges | Cell Number | Active |
| 240-602 | Prince Georges | Cell Number | Active |
| 240-603 | Prince Georges | Cell Number | Active |
| 240-604 | Prince Georges | Cell Number | Active |
| 240-605 | Prince Georges | Cell Number | Active |
| 240-606 | Prince Georges | Cell Number | Active |