| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 406-10** | (303) 406-1010 - (303) 406-1043 | 3 |
| (303) 406-11** | (303) 406-1119 - (303) 406-1192 | 6 |
| (303) 406-12** | (303) 406-1211 - (303) 406-1299 | 3 |
| (303) 406-13** | (303) 406-1310 - (303) 406-1397 | 10 |
| (303) 406-14** | (303) 406-1412 - (303) 406-1499 | 9 |
| (303) 406-15** | (303) 406-1501 - (303) 406-1584 | 8 |
| (303) 406-16** | (303) 406-1630 - (303) 406-1698 | 2 |
| (303) 406-17** | (303) 406-1709 - (303) 406-1797 | 7 |
| (303) 406-18** | (303) 406-1805 - (303) 406-1878 | 7 |
| (303) 406-19** | (303) 406-1915 - (303) 406-1998 | 7 |
US Phone Directory: (303) 406-1***
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