| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 449-50** | (303) 449-5000 - (303) 449-5098 | 80 |
| (303) 449-51** | (303) 449-5100 - (303) 449-5199 | 65 |
| (303) 449-52** | (303) 449-5200 - (303) 449-5299 | 74 |
| (303) 449-53** | (303) 449-5300 - (303) 449-5399 | 71 |
| (303) 449-54** | (303) 449-5404 - (303) 449-5499 | 66 |
| (303) 449-55** | (303) 449-5500 - (303) 449-5599 | 84 |
| (303) 449-56** | (303) 449-5600 - (303) 449-5699 | 81 |
| (303) 449-57** | (303) 449-5702 - (303) 449-5799 | 72 |
| (303) 449-58** | (303) 449-5800 - (303) 449-5898 | 74 |
| (303) 449-59** | (303) 449-5902 - (303) 449-5998 | 74 |
US Phone Directory: (303) 449-5***
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