| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 601-10** | (301) 601-1022 - (301) 601-1022 | 1 |
| (301) 601-11** | (301) 601-1168 - (301) 601-1168 | 1 |
| (301) 601-12** | (301) 601-1226 - (301) 601-1248 | 2 |
| (301) 601-13** | (301) 601-1308 - (301) 601-1385 | 2 |
| (301) 601-15** | (301) 601-1500 - (301) 601-1598 | 21 |
| (301) 601-16** | (301) 601-1642 - (301) 601-1692 | 6 |
| (301) 601-17** | (301) 601-1717 - (301) 601-1717 | 1 |
| (301) 601-18** | (301) 601-1800 - (301) 601-1859 | 12 |
| (301) 601-19** | (301) 601-1900 - (301) 601-1998 | 44 |
US Phone Directory: (301) 601-1***
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