| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 915-50** | (303) 915-5000 - (303) 915-5098 | 32 |
| (303) 915-51** | (303) 915-5100 - (303) 915-5199 | 26 |
| (303) 915-52** | (303) 915-5206 - (303) 915-5299 | 27 |
| (303) 915-53** | (303) 915-5304 - (303) 915-5397 | 33 |
| (303) 915-54** | (303) 915-5404 - (303) 915-5498 | 24 |
| (303) 915-55** | (303) 915-5502 - (303) 915-5597 | 24 |
| (303) 915-56** | (303) 915-5604 - (303) 915-5699 | 28 |
| (303) 915-57** | (303) 915-5701 - (303) 915-5794 | 26 |
| (303) 915-58** | (303) 915-5800 - (303) 915-5898 | 23 |
| (303) 915-59** | (303) 915-5901 - (303) 915-5998 | 29 |
US Phone Directory: (303) 915-5***
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