| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 523-50** | (303) 523-5001 - (303) 523-5099 | 41 |
| (303) 523-51** | (303) 523-5102 - (303) 523-5199 | 45 |
| (303) 523-52** | (303) 523-5204 - (303) 523-5298 | 38 |
| (303) 523-53** | (303) 523-5301 - (303) 523-5399 | 42 |
| (303) 523-54** | (303) 523-5400 - (303) 523-5496 | 37 |
| (303) 523-55** | (303) 523-5511 - (303) 523-5598 | 33 |
| (303) 523-56** | (303) 523-5601 - (303) 523-5696 | 36 |
| (303) 523-57** | (303) 523-5704 - (303) 523-5798 | 36 |
| (303) 523-58** | (303) 523-5802 - (303) 523-5897 | 42 |
| (303) 523-59** | (303) 523-5904 - (303) 523-5995 | 34 |
US Phone Directory: (303) 523-5***
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