| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 576-10** | (301) 576-1000 - (301) 576-1085 | 10 |
| (301) 576-11** | (301) 576-1102 - (301) 576-1190 | 6 |
| (301) 576-12** | (301) 576-1215 - (301) 576-1229 | 2 |
| (301) 576-13** | (301) 576-1305 - (301) 576-1318 | 2 |
| (301) 576-14** | (301) 576-1400 - (301) 576-1444 | 5 |
| (301) 576-15** | (301) 576-1545 - (301) 576-1545 | 1 |
| (301) 576-16** | (301) 576-1601 - (301) 576-1699 | 9 |
| (301) 576-18** | (301) 576-1809 - (301) 576-1898 | 3 |
| (301) 576-19** | (301) 576-1900 - (301) 576-1947 | 5 |
US Phone Directory: (301) 576-1***
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