| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 779-90** | (301) 779-9001 - (301) 779-9099 | 50 |
| (301) 779-91** | (301) 779-9100 - (301) 779-9199 | 65 |
| (301) 779-92** | (301) 779-9200 - (301) 779-9299 | 66 |
| (301) 779-93** | (301) 779-9300 - (301) 779-9399 | 53 |
| (301) 779-94** | (301) 779-9400 - (301) 779-9497 | 56 |
| (301) 779-95** | (301) 779-9501 - (301) 779-9599 | 46 |
| (301) 779-96** | (301) 779-9600 - (301) 779-9696 | 42 |
| (301) 779-97** | (301) 779-9702 - (301) 779-9795 | 33 |
| (301) 779-98** | (301) 779-9808 - (301) 779-9899 | 11 |
| (301) 779-99** | (301) 779-9964 - (301) 779-9964 | 1 |
US Phone Directory: (301) 779-9***
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