| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 433-10** | (303) 433-1000 - (303) 433-1099 | 67 |
| (303) 433-11** | (303) 433-1100 - (303) 433-1199 | 78 |
| (303) 433-12** | (303) 433-1200 - (303) 433-1299 | 72 |
| (303) 433-13** | (303) 433-1300 - (303) 433-1399 | 80 |
| (303) 433-14** | (303) 433-1400 - (303) 433-1499 | 74 |
| (303) 433-15** | (303) 433-1500 - (303) 433-1599 | 80 |
| (303) 433-16** | (303) 433-1600 - (303) 433-1699 | 69 |
| (303) 433-17** | (303) 433-1700 - (303) 433-1799 | 72 |
| (303) 433-18** | (303) 433-1800 - (303) 433-1899 | 76 |
| (303) 433-19** | (303) 433-1900 - (303) 433-1999 | 75 |
US Phone Directory: (303) 433-1***
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