| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 947-61** | (301) 947-6100 - (301) 947-6195 | 4 |
| (301) 947-62** | (301) 947-6298 - (301) 947-6298 | 1 |
| (301) 947-63** | (301) 947-6348 - (301) 947-6348 | 1 |
| (301) 947-64** | (301) 947-6400 - (301) 947-6418 | 2 |
| (301) 947-65** | (301) 947-6500 - (301) 947-6599 | 72 |
| (301) 947-66** | (301) 947-6600 - (301) 947-6699 | 69 |
| (301) 947-67** | (301) 947-6700 - (301) 947-6799 | 79 |
| (301) 947-68** | (301) 947-6801 - (301) 947-6899 | 69 |
| (301) 947-69** | (301) 947-6900 - (301) 947-6987 | 66 |
US Phone Directory: (301) 947-6***
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