| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 666-00** | (303) 666-0000 - (303) 666-0098 | 39 |
| (303) 666-01** | (303) 666-0100 - (303) 666-0199 | 61 |
| (303) 666-02** | (303) 666-0200 - (303) 666-0298 | 66 |
| (303) 666-03** | (303) 666-0300 - (303) 666-0397 | 57 |
| (303) 666-04** | (303) 666-0400 - (303) 666-0499 | 66 |
| (303) 666-05** | (303) 666-0500 - (303) 666-0598 | 61 |
| (303) 666-06** | (303) 666-0600 - (303) 666-0699 | 66 |
| (303) 666-07** | (303) 666-0700 - (303) 666-0799 | 65 |
| (303) 666-08** | (303) 666-0800 - (303) 666-0899 | 76 |
| (303) 666-09** | (303) 666-0900 - (303) 666-0999 | 74 |
US Phone Directory: (303) 666-0***
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