| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 454-10** | (301) 454-1078 - (301) 454-1078 | 1 |
| (301) 454-11** | (301) 454-1109 - (301) 454-1109 | 1 |
| (301) 454-12** | (301) 454-1217 - (301) 454-1279 | 5 |
| (301) 454-14** | (301) 454-1400 - (301) 454-1498 | 14 |
| (301) 454-15** | (301) 454-1533 - (301) 454-1593 | 6 |
| (301) 454-16** | (301) 454-1600 - (301) 454-1692 | 6 |
| (301) 454-17** | (301) 454-1703 - (301) 454-1780 | 9 |
| (301) 454-18** | (301) 454-1810 - (301) 454-1810 | 1 |
| (301) 454-19** | (301) 454-1986 - (301) 454-1986 | 1 |
US Phone Directory: (301) 454-1***
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