| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 440-70** | (303) 440-7000 - (303) 440-7099 | 66 |
| (303) 440-71** | (303) 440-7100 - (303) 440-7199 | 76 |
| (303) 440-72** | (303) 440-7200 - (303) 440-7298 | 70 |
| (303) 440-73** | (303) 440-7302 - (303) 440-7399 | 68 |
| (303) 440-74** | (303) 440-7400 - (303) 440-7499 | 62 |
| (303) 440-75** | (303) 440-7500 - (303) 440-7598 | 72 |
| (303) 440-76** | (303) 440-7600 - (303) 440-7699 | 68 |
| (303) 440-77** | (303) 440-7700 - (303) 440-7799 | 63 |
| (303) 440-78** | (303) 440-7800 - (303) 440-7899 | 74 |
| (303) 440-79** | (303) 440-7900 - (303) 440-7999 | 69 |
US Phone Directory: (303) 440-7***
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