| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 499-90** | (301) 499-9016 - (301) 499-9016 | 1 |
| (301) 499-91** | (301) 499-9152 - (301) 499-9171 | 2 |
| (301) 499-92** | (301) 499-9200 - (301) 499-9293 | 45 |
| (301) 499-93** | (301) 499-9302 - (301) 499-9398 | 52 |
| (301) 499-94** | (301) 499-9400 - (301) 499-9498 | 57 |
| (301) 499-95** | (301) 499-9501 - (301) 499-9599 | 19 |
| (301) 499-96** | (301) 499-9601 - (301) 499-9699 | 54 |
| (301) 499-97** | (301) 499-9701 - (301) 499-9799 | 65 |
| (301) 499-98** | (301) 499-9800 - (301) 499-9899 | 17 |
| (301) 499-99** | (301) 499-9919 - (301) 499-9919 | 1 |
US Phone Directory: (301) 499-9***
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