| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 791-60** | (301) 791-6000 - (301) 791-6098 | 56 |
| (301) 791-61** | (301) 791-6100 - (301) 791-6196 | 70 |
| (301) 791-62** | (301) 791-6200 - (301) 791-6298 | 61 |
| (301) 791-63** | (301) 791-6300 - (301) 791-6396 | 65 |
| (301) 791-64** | (301) 791-6400 - (301) 791-6497 | 69 |
| (301) 791-65** | (301) 791-6500 - (301) 791-6597 | 52 |
| (301) 791-66** | (301) 791-6600 - (301) 791-6699 | 63 |
| (301) 791-67** | (301) 791-6700 - (301) 791-6799 | 63 |
| (301) 791-68** | (301) 791-6800 - (301) 791-6898 | 57 |
| (301) 791-69** | (301) 791-6900 - (301) 791-6996 | 60 |
US Phone Directory: (301) 791-6***
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