| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 775-60** | (301) 775-6002 - (301) 775-6099 | 44 |
| (301) 775-61** | (301) 775-6100 - (301) 775-6199 | 39 |
| (301) 775-62** | (301) 775-6203 - (301) 775-6299 | 28 |
| (301) 775-63** | (301) 775-6300 - (301) 775-6395 | 40 |
| (301) 775-64** | (301) 775-6401 - (301) 775-6497 | 42 |
| (301) 775-65** | (301) 775-6500 - (301) 775-6595 | 35 |
| (301) 775-66** | (301) 775-6600 - (301) 775-6699 | 34 |
| (301) 775-67** | (301) 775-6701 - (301) 775-6797 | 33 |
| (301) 775-68** | (301) 775-6810 - (301) 775-6894 | 24 |
| (301) 775-69** | (301) 775-6900 - (301) 775-6997 | 42 |
US Phone Directory: (301) 775-6***
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