| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 287-10** | (303) 287-1000 - (303) 287-1099 | 64 |
| (303) 287-11** | (303) 287-1100 - (303) 287-1198 | 67 |
| (303) 287-12** | (303) 287-1200 - (303) 287-1299 | 75 |
| (303) 287-13** | (303) 287-1300 - (303) 287-1399 | 67 |
| (303) 287-14** | (303) 287-1400 - (303) 287-1499 | 86 |
| (303) 287-15** | (303) 287-1500 - (303) 287-1599 | 71 |
| (303) 287-16** | (303) 287-1600 - (303) 287-1699 | 76 |
| (303) 287-17** | (303) 287-1700 - (303) 287-1797 | 59 |
| (303) 287-18** | (303) 287-1800 - (303) 287-1896 | 72 |
| (303) 287-19** | (303) 287-1900 - (303) 287-1999 | 73 |
US Phone Directory: (303) 287-1***
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