| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 863-10** | (303) 863-1000 - (303) 863-1099 | 47 |
| (303) 863-11** | (303) 863-1100 - (303) 863-1195 | 43 |
| (303) 863-12** | (303) 863-1200 - (303) 863-1299 | 54 |
| (303) 863-13** | (303) 863-1300 - (303) 863-1399 | 44 |
| (303) 863-14** | (303) 863-1400 - (303) 863-1496 | 38 |
| (303) 863-15** | (303) 863-1500 - (303) 863-1597 | 34 |
| (303) 863-16** | (303) 863-1600 - (303) 863-1699 | 47 |
| (303) 863-17** | (303) 863-1700 - (303) 863-1799 | 46 |
| (303) 863-18** | (303) 863-1800 - (303) 863-1899 | 40 |
| (303) 863-19** | (303) 863-1900 - (303) 863-1998 | 47 |
US Phone Directory: (303) 863-1***
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