| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 429-61** | (301) 429-6100 - (301) 429-6199 | 42 |
| (301) 429-62** | (301) 429-6200 - (301) 429-6290 | 12 |
| (301) 429-63** | (301) 429-6368 - (301) 429-6368 | 1 |
| (301) 429-64** | (301) 429-6423 - (301) 429-6495 | 17 |
| (301) 429-65** | (301) 429-6593 - (301) 429-6593 | 1 |
| (301) 429-67** | (301) 429-6741 - (301) 429-6758 | 2 |
| (301) 429-69** | (301) 429-6967 - (301) 429-6967 | 1 |
US Phone Directory: (301) 429-6***
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