| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 320-70** | (303) 320-7057 - (303) 320-7088 | 3 |
| (303) 320-71** | (303) 320-7101 - (303) 320-7189 | 6 |
| (303) 320-72** | (303) 320-7213 - (303) 320-7213 | 1 |
| (303) 320-73** | (303) 320-7340 - (303) 320-7367 | 3 |
| (303) 320-74** | (303) 320-7470 - (303) 320-7499 | 4 |
| (303) 320-75** | (303) 320-7500 - (303) 320-7599 | 60 |
| (303) 320-76** | (303) 320-7600 - (303) 320-7699 | 66 |
| (303) 320-77** | (303) 320-7701 - (303) 320-7799 | 69 |
| (303) 320-78** | (303) 320-7800 - (303) 320-7898 | 52 |
| (303) 320-79** | (303) 320-7900 - (303) 320-7960 | 4 |
US Phone Directory: (303) 320-7***
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