| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 529-60** | (301) 529-6010 - (301) 529-6099 | 27 |
| (301) 529-61** | (301) 529-6103 - (301) 529-6184 | 30 |
| (301) 529-62** | (301) 529-6203 - (301) 529-6298 | 29 |
| (301) 529-63** | (301) 529-6300 - (301) 529-6387 | 28 |
| (301) 529-64** | (301) 529-6402 - (301) 529-6499 | 24 |
| (301) 529-65** | (301) 529-6516 - (301) 529-6593 | 25 |
| (301) 529-66** | (301) 529-6602 - (301) 529-6699 | 18 |
| (301) 529-67** | (301) 529-6701 - (301) 529-6799 | 28 |
| (301) 529-68** | (301) 529-6805 - (301) 529-6899 | 29 |
| (301) 529-69** | (301) 529-6901 - (301) 529-6994 | 27 |
US Phone Directory: (301) 529-6***
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