| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 748-10** | (301) 748-1000 - (301) 748-1098 | 22 |
| (301) 748-11** | (301) 748-1101 - (301) 748-1195 | 28 |
| (301) 748-12** | (301) 748-1203 - (301) 748-1289 | 16 |
| (301) 748-13** | (301) 748-1306 - (301) 748-1381 | 34 |
| (301) 748-14** | (301) 748-1400 - (301) 748-1497 | 23 |
| (301) 748-15** | (301) 748-1500 - (301) 748-1599 | 30 |
| (301) 748-16** | (301) 748-1605 - (301) 748-1695 | 28 |
| (301) 748-17** | (301) 748-1701 - (301) 748-1796 | 21 |
| (301) 748-18** | (301) 748-1806 - (301) 748-1897 | 24 |
| (301) 748-19** | (301) 748-1901 - (301) 748-1992 | 41 |
US Phone Directory: (301) 748-1***
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