| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (240) 535-60** | (240) 535-6007 - (240) 535-6088 | 17 |
| (240) 535-61** | (240) 535-6106 - (240) 535-6195 | 17 |
| (240) 535-62** | (240) 535-6201 - (240) 535-6293 | 16 |
| (240) 535-63** | (240) 535-6304 - (240) 535-6396 | 12 |
| (240) 535-64** | (240) 535-6400 - (240) 535-6499 | 18 |
| (240) 535-65** | (240) 535-6501 - (240) 535-6594 | 21 |
| (240) 535-66** | (240) 535-6600 - (240) 535-6697 | 15 |
| (240) 535-67** | (240) 535-6705 - (240) 535-6795 | 14 |
| (240) 535-68** | (240) 535-6801 - (240) 535-6884 | 14 |
| (240) 535-69** | (240) 535-6902 - (240) 535-6997 | 14 |
US Phone Directory: (240) 535-6***
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