| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 721-80** | (303) 721-8000 - (303) 721-8098 | 26 |
| (303) 721-81** | (303) 721-8100 - (303) 721-8198 | 40 |
| (303) 721-82** | (303) 721-8200 - (303) 721-8297 | 33 |
| (303) 721-83** | (303) 721-8300 - (303) 721-8388 | 40 |
| (303) 721-84** | (303) 721-8400 - (303) 721-8499 | 42 |
| (303) 721-85** | (303) 721-8503 - (303) 721-8599 | 46 |
| (303) 721-86** | (303) 721-8600 - (303) 721-8699 | 46 |
| (303) 721-87** | (303) 721-8700 - (303) 721-8796 | 49 |
| (303) 721-88** | (303) 721-8800 - (303) 721-8899 | 51 |
| (303) 721-89** | (303) 721-8900 - (303) 721-8999 | 42 |
US Phone Directory: (303) 721-8***
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