| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 870-00** | (303) 870-0001 - (303) 870-0098 | 47 |
| (303) 870-01** | (303) 870-0100 - (303) 870-0195 | 41 |
| (303) 870-02** | (303) 870-0200 - (303) 870-0298 | 50 |
| (303) 870-03** | (303) 870-0301 - (303) 870-0399 | 52 |
| (303) 870-04** | (303) 870-0401 - (303) 870-0498 | 41 |
| (303) 870-05** | (303) 870-0500 - (303) 870-0599 | 48 |
| (303) 870-06** | (303) 870-0600 - (303) 870-0697 | 48 |
| (303) 870-07** | (303) 870-0700 - (303) 870-0799 | 47 |
| (303) 870-08** | (303) 870-0800 - (303) 870-0896 | 44 |
| (303) 870-09** | (303) 870-0900 - (303) 870-0998 | 44 |
US Phone Directory: (303) 870-0***
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