| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 292-10** | (301) 292-1000 - (301) 292-1098 | 82 |
| (301) 292-11** | (301) 292-1100 - (301) 292-1199 | 77 |
| (301) 292-12** | (301) 292-1200 - (301) 292-1299 | 81 |
| (301) 292-13** | (301) 292-1300 - (301) 292-1399 | 78 |
| (301) 292-14** | (301) 292-1400 - (301) 292-1499 | 82 |
| (301) 292-15** | (301) 292-1501 - (301) 292-1599 | 79 |
| (301) 292-16** | (301) 292-1600 - (301) 292-1699 | 77 |
| (301) 292-17** | (301) 292-1700 - (301) 292-1799 | 80 |
| (301) 292-18** | (301) 292-1800 - (301) 292-1899 | 70 |
| (301) 292-19** | (301) 292-1900 - (301) 292-1999 | 80 |
US Phone Directory: (301) 292-1***
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