| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 977-60** | (301) 977-6000 - (301) 977-6098 | 82 |
| (301) 977-61** | (301) 977-6102 - (301) 977-6199 | 75 |
| (301) 977-62** | (301) 977-6200 - (301) 977-6299 | 77 |
| (301) 977-63** | (301) 977-6300 - (301) 977-6398 | 79 |
| (301) 977-64** | (301) 977-6400 - (301) 977-6499 | 80 |
| (301) 977-65** | (301) 977-6500 - (301) 977-6599 | 77 |
| (301) 977-66** | (301) 977-6600 - (301) 977-6699 | 77 |
| (301) 977-67** | (301) 977-6701 - (301) 977-6799 | 85 |
| (301) 977-68** | (301) 977-6800 - (301) 977-6899 | 76 |
| (301) 977-69** | (301) 977-6901 - (301) 977-6999 | 79 |
US Phone Directory: (301) 977-6***
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