| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 946-60** | (301) 946-6000 - (301) 946-6099 | 66 |
| (301) 946-61** | (301) 946-6100 - (301) 946-6199 | 70 |
| (301) 946-62** | (301) 946-6200 - (301) 946-6299 | 70 |
| (301) 946-63** | (301) 946-6300 - (301) 946-6399 | 75 |
| (301) 946-64** | (301) 946-6400 - (301) 946-6499 | 71 |
| (301) 946-65** | (301) 946-6500 - (301) 946-6599 | 79 |
| (301) 946-66** | (301) 946-6604 - (301) 946-6699 | 69 |
| (301) 946-67** | (301) 946-6700 - (301) 946-6799 | 69 |
| (301) 946-68** | (301) 946-6800 - (301) 946-6898 | 77 |
| (301) 946-69** | (301) 946-6900 - (301) 946-6999 | 76 |
US Phone Directory: (301) 946-6***
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