| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 283-10** | (303) 283-1000 - (303) 283-1099 | 75 |
| (303) 283-11** | (303) 283-1100 - (303) 283-1197 | 68 |
| (303) 283-12** | (303) 283-1204 - (303) 283-1299 | 63 |
| (303) 283-13** | (303) 283-1300 - (303) 283-1399 | 60 |
| (303) 283-14** | (303) 283-1400 - (303) 283-1497 | 59 |
| (303) 283-15** | (303) 283-1503 - (303) 283-1599 | 63 |
| (303) 283-16** | (303) 283-1600 - (303) 283-1698 | 59 |
| (303) 283-17** | (303) 283-1700 - (303) 283-1799 | 55 |
| (303) 283-18** | (303) 283-1801 - (303) 283-1899 | 51 |
| (303) 283-19** | (303) 283-1902 - (303) 283-1997 | 53 |
US Phone Directory: (303) 283-1***
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