| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 840-30** | (303) 840-3000 - (303) 840-3099 | 75 |
| (303) 840-31** | (303) 840-3100 - (303) 840-3199 | 76 |
| (303) 840-32** | (303) 840-3200 - (303) 840-3299 | 74 |
| (303) 840-33** | (303) 840-3300 - (303) 840-3398 | 72 |
| (303) 840-34** | (303) 840-3400 - (303) 840-3499 | 74 |
| (303) 840-35** | (303) 840-3501 - (303) 840-3599 | 80 |
| (303) 840-36** | (303) 840-3600 - (303) 840-3698 | 74 |
| (303) 840-37** | (303) 840-3700 - (303) 840-3799 | 78 |
| (303) 840-38** | (303) 840-3800 - (303) 840-3899 | 73 |
| (303) 840-39** | (303) 840-3900 - (303) 840-3997 | 65 |
US Phone Directory: (303) 840-3***
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