| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 929-10** | (301) 929-1000 - (301) 929-1099 | 66 |
| (301) 929-11** | (301) 929-1100 - (301) 929-1198 | 68 |
| (301) 929-12** | (301) 929-1201 - (301) 929-1299 | 70 |
| (301) 929-13** | (301) 929-1306 - (301) 929-1399 | 61 |
| (301) 929-14** | (301) 929-1401 - (301) 929-1496 | 60 |
| (301) 929-15** | (301) 929-1500 - (301) 929-1596 | 57 |
| (301) 929-16** | (301) 929-1600 - (301) 929-1699 | 60 |
| (301) 929-17** | (301) 929-1700 - (301) 929-1798 | 56 |
| (301) 929-18** | (301) 929-1801 - (301) 929-1899 | 52 |
| (301) 929-19** | (301) 929-1900 - (301) 929-1999 | 64 |
US Phone Directory: (301) 929-1***
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