| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 771-50** | (303) 771-5000 - (303) 771-5099 | 69 |
| (303) 771-51** | (303) 771-5100 - (303) 771-5199 | 82 |
| (303) 771-52** | (303) 771-5201 - (303) 771-5299 | 74 |
| (303) 771-53** | (303) 771-5300 - (303) 771-5399 | 72 |
| (303) 771-54** | (303) 771-5400 - (303) 771-5499 | 76 |
| (303) 771-55** | (303) 771-5500 - (303) 771-5598 | 72 |
| (303) 771-56** | (303) 771-5601 - (303) 771-5695 | 63 |
| (303) 771-57** | (303) 771-5700 - (303) 771-5799 | 72 |
| (303) 771-58** | (303) 771-5800 - (303) 771-5899 | 78 |
| (303) 771-59** | (303) 771-5900 - (303) 771-5999 | 68 |
US Phone Directory: (303) 771-5***
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