| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 904-10** | (303) 904-1000 - (303) 904-1098 | 68 |
| (303) 904-11** | (303) 904-1100 - (303) 904-1198 | 74 |
| (303) 904-12** | (303) 904-1200 - (303) 904-1299 | 65 |
| (303) 904-13** | (303) 904-1300 - (303) 904-1399 | 69 |
| (303) 904-14** | (303) 904-1401 - (303) 904-1499 | 70 |
| (303) 904-15** | (303) 904-1500 - (303) 904-1599 | 64 |
| (303) 904-16** | (303) 904-1600 - (303) 904-1699 | 68 |
| (303) 904-17** | (303) 904-1700 - (303) 904-1799 | 73 |
| (303) 904-18** | (303) 904-1800 - (303) 904-1898 | 57 |
| (303) 904-19** | (303) 904-1900 - (303) 904-1999 | 66 |
US Phone Directory: (303) 904-1***
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