| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 442-60** | (301) 442-6006 - (301) 442-6086 | 7 |
| (301) 442-61** | (301) 442-6103 - (301) 442-6175 | 3 |
| (301) 442-62** | (301) 442-6200 - (301) 442-6290 | 11 |
| (301) 442-63** | (301) 442-6302 - (301) 442-6399 | 11 |
| (301) 442-64** | (301) 442-6414 - (301) 442-6493 | 6 |
| (301) 442-65** | (301) 442-6510 - (301) 442-6588 | 6 |
| (301) 442-66** | (301) 442-6610 - (301) 442-6694 | 7 |
| (301) 442-67** | (301) 442-6700 - (301) 442-6791 | 13 |
| (301) 442-68** | (301) 442-6813 - (301) 442-6883 | 8 |
| (301) 442-69** | (301) 442-6901 - (301) 442-6991 | 10 |
US Phone Directory: (301) 442-6***
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