| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 717-60** | (301) 717-6000 - (301) 717-6098 | 36 |
| (301) 717-61** | (301) 717-6103 - (301) 717-6199 | 40 |
| (301) 717-62** | (301) 717-6202 - (301) 717-6299 | 43 |
| (301) 717-63** | (301) 717-6300 - (301) 717-6399 | 45 |
| (301) 717-64** | (301) 717-6400 - (301) 717-6498 | 41 |
| (301) 717-65** | (301) 717-6500 - (301) 717-6593 | 31 |
| (301) 717-66** | (301) 717-6604 - (301) 717-6699 | 36 |
| (301) 717-67** | (301) 717-6705 - (301) 717-6797 | 37 |
| (301) 717-68** | (301) 717-6800 - (301) 717-6895 | 37 |
| (301) 717-69** | (301) 717-6901 - (301) 717-6999 | 32 |
US Phone Directory: (301) 717-6***
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