| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 678-10** | (303) 678-1000 - (303) 678-1096 | 76 |
| (303) 678-11** | (303) 678-1100 - (303) 678-1199 | 83 |
| (303) 678-12** | (303) 678-1200 - (303) 678-1299 | 77 |
| (303) 678-13** | (303) 678-1300 - (303) 678-1399 | 81 |
| (303) 678-14** | (303) 678-1401 - (303) 678-1499 | 88 |
| (303) 678-15** | (303) 678-1501 - (303) 678-1599 | 92 |
| (303) 678-16** | (303) 678-1600 - (303) 678-1699 | 82 |
| (303) 678-17** | (303) 678-1700 - (303) 678-1799 | 79 |
| (303) 678-18** | (303) 678-1800 - (303) 678-1899 | 76 |
| (303) 678-19** | (303) 678-1901 - (303) 678-1999 | 81 |
US Phone Directory: (303) 678-1***
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