| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 237-60** | (301) 237-6000 - (301) 237-6089 | 8 |
| (301) 237-61** | (301) 237-6119 - (301) 237-6183 | 8 |
| (301) 237-62** | (301) 237-6205 - (301) 237-6285 | 10 |
| (301) 237-63** | (301) 237-6308 - (301) 237-6398 | 9 |
| (301) 237-64** | (301) 237-6403 - (301) 237-6483 | 13 |
| (301) 237-65** | (301) 237-6529 - (301) 237-6589 | 6 |
| (301) 237-66** | (301) 237-6603 - (301) 237-6691 | 10 |
| (301) 237-67** | (301) 237-6741 - (301) 237-6799 | 6 |
| (301) 237-68** | (301) 237-6806 - (301) 237-6881 | 12 |
| (301) 237-69** | (301) 237-6906 - (301) 237-6989 | 5 |
US Phone Directory: (301) 237-6***
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