| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 938-10** | (301) 938-1004 - (301) 938-1099 | 34 |
| (301) 938-11** | (301) 938-1100 - (301) 938-1197 | 31 |
| (301) 938-12** | (301) 938-1204 - (301) 938-1298 | 35 |
| (301) 938-13** | (301) 938-1300 - (301) 938-1399 | 42 |
| (301) 938-14** | (301) 938-1401 - (301) 938-1498 | 33 |
| (301) 938-15** | (301) 938-1500 - (301) 938-1590 | 26 |
| (301) 938-16** | (301) 938-1603 - (301) 938-1697 | 31 |
| (301) 938-17** | (301) 938-1701 - (301) 938-1799 | 15 |
| (301) 938-18** | (301) 938-1800 - (301) 938-1899 | 20 |
| (301) 938-19** | (301) 938-1942 - (301) 938-1999 | 14 |
US Phone Directory: (301) 938-1***
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