| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 523-70** | (303) 523-7000 - (303) 523-7096 | 35 |
| (303) 523-71** | (303) 523-7100 - (303) 523-7196 | 34 |
| (303) 523-72** | (303) 523-7201 - (303) 523-7295 | 40 |
| (303) 523-73** | (303) 523-7300 - (303) 523-7398 | 36 |
| (303) 523-74** | (303) 523-7400 - (303) 523-7493 | 40 |
| (303) 523-75** | (303) 523-7500 - (303) 523-7599 | 29 |
| (303) 523-76** | (303) 523-7606 - (303) 523-7699 | 45 |
| (303) 523-77** | (303) 523-7702 - (303) 523-7791 | 42 |
| (303) 523-78** | (303) 523-7801 - (303) 523-7897 | 49 |
| (303) 523-79** | (303) 523-7901 - (303) 523-7999 | 33 |
US Phone Directory: (303) 523-7***
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