| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 725-60** | (301) 725-6000 - (301) 725-6099 | 66 |
| (301) 725-61** | (301) 725-6100 - (301) 725-6199 | 74 |
| (301) 725-62** | (301) 725-6200 - (301) 725-6298 | 72 |
| (301) 725-63** | (301) 725-6300 - (301) 725-6399 | 73 |
| (301) 725-64** | (301) 725-6400 - (301) 725-6498 | 78 |
| (301) 725-65** | (301) 725-6500 - (301) 725-6599 | 66 |
| (301) 725-66** | (301) 725-6601 - (301) 725-6699 | 74 |
| (301) 725-67** | (301) 725-6700 - (301) 725-6799 | 59 |
| (301) 725-68** | (301) 725-6800 - (301) 725-6899 | 70 |
| (301) 725-69** | (301) 725-6900 - (301) 725-6999 | 66 |
US Phone Directory: (301) 725-6***
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