| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (240) 603-60** | (240) 603-6005 - (240) 603-6091 | 4 |
| (240) 603-61** | (240) 603-6119 - (240) 603-6185 | 6 |
| (240) 603-62** | (240) 603-6201 - (240) 603-6290 | 4 |
| (240) 603-63** | (240) 603-6325 - (240) 603-6382 | 2 |
| (240) 603-64** | (240) 603-6403 - (240) 603-6489 | 5 |
| (240) 603-65** | (240) 603-6518 - (240) 603-6576 | 2 |
| (240) 603-66** | (240) 603-6628 - (240) 603-6664 | 3 |
| (240) 603-67** | (240) 603-6712 - (240) 603-6786 | 11 |
| (240) 603-68** | (240) 603-6829 - (240) 603-6881 | 8 |
| (240) 603-69** | (240) 603-6926 - (240) 603-6997 | 8 |
US Phone Directory: (240) 603-6***
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