| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 283-50** | (303) 283-5004 - (303) 283-5004 | 1 |
| (303) 283-51** | (303) 283-5144 - (303) 283-5174 | 12 |
| (303) 283-52** | (303) 283-5214 - (303) 283-5299 | 18 |
| (303) 283-53** | (303) 283-5300 - (303) 283-5395 | 3 |
| (303) 283-54** | (303) 283-5402 - (303) 283-5470 | 4 |
| (303) 283-55** | (303) 283-5561 - (303) 283-5598 | 29 |
| (303) 283-56** | (303) 283-5603 - (303) 283-5699 | 65 |
| (303) 283-57** | (303) 283-5700 - (303) 283-5779 | 57 |
| (303) 283-58** | (303) 283-5800 - (303) 283-5899 | 48 |
| (303) 283-59** | (303) 283-5900 - (303) 283-5999 | 59 |
US Phone Directory: (303) 283-5***
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