| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 237-20** | (303) 237-2001 - (303) 237-2099 | 66 |
| (303) 237-21** | (303) 237-2100 - (303) 237-2199 | 70 |
| (303) 237-22** | (303) 237-2200 - (303) 237-2299 | 71 |
| (303) 237-23** | (303) 237-2300 - (303) 237-2399 | 76 |
| (303) 237-24** | (303) 237-2400 - (303) 237-2499 | 79 |
| (303) 237-25** | (303) 237-2500 - (303) 237-2599 | 67 |
| (303) 237-26** | (303) 237-2600 - (303) 237-2698 | 73 |
| (303) 237-27** | (303) 237-2700 - (303) 237-2799 | 64 |
| (303) 237-28** | (303) 237-2800 - (303) 237-2897 | 63 |
| (303) 237-29** | (303) 237-2900 - (303) 237-2999 | 65 |
US Phone Directory: (303) 237-2***
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