| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 912-10** | (301) 912-1002 - (301) 912-1098 | 56 |
| (301) 912-11** | (301) 912-1102 - (301) 912-1199 | 64 |
| (301) 912-12** | (301) 912-1200 - (301) 912-1299 | 55 |
| (301) 912-13** | (301) 912-1301 - (301) 912-1397 | 54 |
| (301) 912-14** | (301) 912-1400 - (301) 912-1497 | 55 |
| (301) 912-15** | (301) 912-1500 - (301) 912-1599 | 59 |
| (301) 912-16** | (301) 912-1602 - (301) 912-1699 | 50 |
| (301) 912-17** | (301) 912-1707 - (301) 912-1799 | 35 |
| (301) 912-18** | (301) 912-1801 - (301) 912-1896 | 17 |
| (301) 912-19** | (301) 912-1910 - (301) 912-1998 | 54 |
US Phone Directory: (301) 912-1***
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