| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 422-10** | (301) 422-1001 - (301) 422-1099 | 76 |
| (301) 422-11** | (301) 422-1100 - (301) 422-1199 | 61 |
| (301) 422-12** | (301) 422-1201 - (301) 422-1299 | 64 |
| (301) 422-13** | (301) 422-1300 - (301) 422-1399 | 67 |
| (301) 422-14** | (301) 422-1400 - (301) 422-1499 | 76 |
| (301) 422-15** | (301) 422-1500 - (301) 422-1599 | 73 |
| (301) 422-16** | (301) 422-1606 - (301) 422-1699 | 64 |
| (301) 422-17** | (301) 422-1701 - (301) 422-1799 | 64 |
| (301) 422-18** | (301) 422-1805 - (301) 422-1898 | 73 |
| (301) 422-19** | (301) 422-1901 - (301) 422-1999 | 73 |
US Phone Directory: (301) 422-1***
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