| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 484-10** | (301) 484-1000 - (301) 484-1099 | 69 |
| (301) 484-11** | (301) 484-1100 - (301) 484-1199 | 86 |
| (301) 484-12** | (301) 484-1201 - (301) 484-1299 | 72 |
| (301) 484-13** | (301) 484-1300 - (301) 484-1399 | 50 |
| (301) 484-14** | (301) 484-1402 - (301) 484-1497 | 54 |
| (301) 484-15** | (301) 484-1501 - (301) 484-1598 | 60 |
| (301) 484-16** | (301) 484-1600 - (301) 484-1699 | 62 |
| (301) 484-17** | (301) 484-1700 - (301) 484-1799 | 46 |
| (301) 484-18** | (301) 484-1801 - (301) 484-1899 | 59 |
| (301) 484-19** | (301) 484-1902 - (301) 484-1998 | 60 |
US Phone Directory: (301) 484-1***
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