| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 438-10** | (303) 438-1000 - (303) 438-1098 | 64 |
| (303) 438-11** | (303) 438-1100 - (303) 438-1198 | 63 |
| (303) 438-12** | (303) 438-1200 - (303) 438-1299 | 63 |
| (303) 438-13** | (303) 438-1300 - (303) 438-1398 | 54 |
| (303) 438-14** | (303) 438-1400 - (303) 438-1499 | 66 |
| (303) 438-15** | (303) 438-1500 - (303) 438-1599 | 68 |
| (303) 438-16** | (303) 438-1600 - (303) 438-1699 | 61 |
| (303) 438-17** | (303) 438-1700 - (303) 438-1795 | 67 |
| (303) 438-18** | (303) 438-1801 - (303) 438-1899 | 69 |
| (303) 438-19** | (303) 438-1900 - (303) 438-1998 | 67 |
US Phone Directory: (303) 438-1***
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