| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 810-30** | (303) 810-3010 - (303) 810-3090 | 17 |
| (303) 810-31** | (303) 810-3100 - (303) 810-3191 | 19 |
| (303) 810-32** | (303) 810-3202 - (303) 810-3299 | 26 |
| (303) 810-33** | (303) 810-3304 - (303) 810-3394 | 26 |
| (303) 810-34** | (303) 810-3406 - (303) 810-3497 | 17 |
| (303) 810-35** | (303) 810-3501 - (303) 810-3593 | 22 |
| (303) 810-36** | (303) 810-3603 - (303) 810-3696 | 22 |
| (303) 810-37** | (303) 810-3700 - (303) 810-3795 | 30 |
| (303) 810-38** | (303) 810-3808 - (303) 810-3896 | 25 |
| (303) 810-39** | (303) 810-3900 - (303) 810-3994 | 29 |
US Phone Directory: (303) 810-3***
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