| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 831-00** | (303) 831-0000 - (303) 831-0099 | 18 |
| (303) 831-01** | (303) 831-0100 - (303) 831-0198 | 60 |
| (303) 831-02** | (303) 831-0200 - (303) 831-0297 | 67 |
| (303) 831-03** | (303) 831-0300 - (303) 831-0399 | 55 |
| (303) 831-04** | (303) 831-0400 - (303) 831-0499 | 51 |
| (303) 831-05** | (303) 831-0500 - (303) 831-0599 | 56 |
| (303) 831-06** | (303) 831-0601 - (303) 831-0699 | 56 |
| (303) 831-07** | (303) 831-0700 - (303) 831-0799 | 57 |
| (303) 831-08** | (303) 831-0800 - (303) 831-0899 | 66 |
| (303) 831-09** | (303) 831-0901 - (303) 831-0999 | 72 |
US Phone Directory: (303) 831-0***
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