| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 274-00** | (303) 274-0038 - (303) 274-0089 | 3 |
| (303) 274-01** | (303) 274-0122 - (303) 274-0198 | 43 |
| (303) 274-02** | (303) 274-0200 - (303) 274-0299 | 73 |
| (303) 274-03** | (303) 274-0300 - (303) 274-0399 | 71 |
| (303) 274-04** | (303) 274-0400 - (303) 274-0499 | 84 |
| (303) 274-05** | (303) 274-0501 - (303) 274-0599 | 72 |
| (303) 274-06** | (303) 274-0600 - (303) 274-0698 | 73 |
| (303) 274-07** | (303) 274-0700 - (303) 274-0797 | 73 |
| (303) 274-08** | (303) 274-0800 - (303) 274-0899 | 78 |
| (303) 274-09** | (303) 274-0900 - (303) 274-0999 | 79 |
US Phone Directory: (303) 274-0***
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