| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 284-50** | (303) 284-5000 - (303) 284-5099 | 83 |
| (303) 284-51** | (303) 284-5103 - (303) 284-5199 | 80 |
| (303) 284-52** | (303) 284-5200 - (303) 284-5299 | 78 |
| (303) 284-53** | (303) 284-5300 - (303) 284-5399 | 81 |
| (303) 284-54** | (303) 284-5400 - (303) 284-5498 | 78 |
| (303) 284-55** | (303) 284-5500 - (303) 284-5599 | 85 |
| (303) 284-56** | (303) 284-5600 - (303) 284-5698 | 84 |
| (303) 284-57** | (303) 284-5701 - (303) 284-5798 | 83 |
| (303) 284-58** | (303) 284-5800 - (303) 284-5899 | 90 |
| (303) 284-59** | (303) 284-5900 - (303) 284-5999 | 78 |
US Phone Directory: (303) 284-5***
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