| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 337-50** | (303) 337-5000 - (303) 337-5099 | 58 |
| (303) 337-51** | (303) 337-5100 - (303) 337-5198 | 61 |
| (303) 337-52** | (303) 337-5200 - (303) 337-5299 | 63 |
| (303) 337-53** | (303) 337-5300 - (303) 337-5398 | 62 |
| (303) 337-54** | (303) 337-5400 - (303) 337-5499 | 60 |
| (303) 337-55** | (303) 337-5500 - (303) 337-5598 | 63 |
| (303) 337-56** | (303) 337-5600 - (303) 337-5698 | 54 |
| (303) 337-57** | (303) 337-5700 - (303) 337-5799 | 62 |
| (303) 337-58** | (303) 337-5800 - (303) 337-5899 | 60 |
| (303) 337-59** | (303) 337-5900 - (303) 337-5999 | 62 |
US Phone Directory: (303) 337-5***
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