| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 431-20** | (303) 431-2000 - (303) 431-2099 | 66 |
| (303) 431-21** | (303) 431-2100 - (303) 431-2199 | 70 |
| (303) 431-22** | (303) 431-2200 - (303) 431-2299 | 63 |
| (303) 431-23** | (303) 431-2300 - (303) 431-2398 | 62 |
| (303) 431-24** | (303) 431-2400 - (303) 431-2499 | 65 |
| (303) 431-25** | (303) 431-2500 - (303) 431-2599 | 70 |
| (303) 431-26** | (303) 431-2600 - (303) 431-2699 | 59 |
| (303) 431-27** | (303) 431-2700 - (303) 431-2799 | 57 |
| (303) 431-28** | (303) 431-2800 - (303) 431-2899 | 66 |
| (303) 431-29** | (303) 431-2900 - (303) 431-2998 | 60 |
US Phone Directory: (303) 431-2***
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