| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 429-90** | (301) 429-9000 - (301) 429-9079 | 4 |
| (301) 429-91** | (301) 429-9100 - (301) 429-9197 | 42 |
| (301) 429-92** | (301) 429-9200 - (301) 429-9299 | 47 |
| (301) 429-93** | (301) 429-9300 - (301) 429-9398 | 38 |
| (301) 429-94** | (301) 429-9400 - (301) 429-9497 | 49 |
| (301) 429-95** | (301) 429-9500 - (301) 429-9597 | 53 |
| (301) 429-96** | (301) 429-9614 - (301) 429-9699 | 16 |
| (301) 429-97** | (301) 429-9704 - (301) 429-9799 | 42 |
| (301) 429-98** | (301) 429-9809 - (301) 429-9883 | 4 |
US Phone Directory: (301) 429-9***
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