| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 388-70** | (303) 388-7000 - (303) 388-7099 | 76 |
| (303) 388-71** | (303) 388-7100 - (303) 388-7199 | 85 |
| (303) 388-72** | (303) 388-7200 - (303) 388-7298 | 75 |
| (303) 388-73** | (303) 388-7300 - (303) 388-7399 | 77 |
| (303) 388-74** | (303) 388-7400 - (303) 388-7499 | 71 |
| (303) 388-75** | (303) 388-7501 - (303) 388-7599 | 77 |
| (303) 388-76** | (303) 388-7600 - (303) 388-7699 | 82 |
| (303) 388-77** | (303) 388-7701 - (303) 388-7799 | 75 |
| (303) 388-78** | (303) 388-7800 - (303) 388-7899 | 73 |
| (303) 388-79** | (303) 388-7900 - (303) 388-7999 | 63 |
US Phone Directory: (303) 388-7***
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