| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (301) 317-10** | (301) 317-1000 - (301) 317-1098 | 85 |
| (301) 317-11** | (301) 317-1100 - (301) 317-1179 | 29 |
| (301) 317-12** | (301) 317-1200 - (301) 317-1299 | 77 |
| (301) 317-13** | (301) 317-1300 - (301) 317-1399 | 66 |
| (301) 317-14** | (301) 317-1400 - (301) 317-1499 | 78 |
| (301) 317-15** | (301) 317-1500 - (301) 317-1599 | 77 |
| (301) 317-16** | (301) 317-1605 - (301) 317-1698 | 62 |
| (301) 317-17** | (301) 317-1700 - (301) 317-1799 | 82 |
| (301) 317-18** | (301) 317-1801 - (301) 317-1899 | 70 |
| (301) 317-19** | (301) 317-1900 - (301) 317-1999 | 77 |
US Phone Directory: (301) 317-1***
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