| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 639-50** | (303) 639-5000 - (303) 639-5098 | 44 |
| (303) 639-51** | (303) 639-5100 - (303) 639-5196 | 48 |
| (303) 639-52** | (303) 639-5204 - (303) 639-5297 | 34 |
| (303) 639-53** | (303) 639-5301 - (303) 639-5399 | 41 |
| (303) 639-54** | (303) 639-5400 - (303) 639-5499 | 48 |
| (303) 639-55** | (303) 639-5501 - (303) 639-5599 | 52 |
| (303) 639-56** | (303) 639-5600 - (303) 639-5699 | 47 |
| (303) 639-57** | (303) 639-5704 - (303) 639-5795 | 44 |
| (303) 639-58** | (303) 639-5800 - (303) 639-5898 | 42 |
| (303) 639-59** | (303) 639-5904 - (303) 639-5998 | 43 |
US Phone Directory: (303) 639-5***
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