| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 392-60** | (301) 392-6000 - (301) 392-6096 | 81 |
| (301) 392-61** | (301) 392-6100 - (301) 392-6179 | 60 |
| (301) 392-62** | (301) 392-6200 - (301) 392-6299 | 62 |
| (301) 392-63** | (301) 392-6301 - (301) 392-6397 | 51 |
| (301) 392-64** | (301) 392-6400 - (301) 392-6400 | 1 |
| (301) 392-66** | (301) 392-6610 - (301) 392-6645 | 3 |
| (301) 392-67** | (301) 392-6724 - (301) 392-6742 | 4 |
| (301) 392-68** | (301) 392-6845 - (301) 392-6861 | 2 |
| (301) 392-69** | (301) 392-6900 - (301) 392-6982 | 5 |
US Phone Directory: (301) 392-6***
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