| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 427-30** | (303) 427-3000 - (303) 427-3099 | 58 |
| (303) 427-31** | (303) 427-3101 - (303) 427-3199 | 56 |
| (303) 427-32** | (303) 427-3200 - (303) 427-3299 | 60 |
| (303) 427-33** | (303) 427-3300 - (303) 427-3397 | 54 |
| (303) 427-34** | (303) 427-3400 - (303) 427-3499 | 53 |
| (303) 427-35** | (303) 427-3500 - (303) 427-3598 | 57 |
| (303) 427-36** | (303) 427-3602 - (303) 427-3693 | 45 |
| (303) 427-37** | (303) 427-3700 - (303) 427-3799 | 57 |
| (303) 427-38** | (303) 427-3800 - (303) 427-3899 | 58 |
| (303) 427-39** | (303) 427-3900 - (303) 427-3998 | 65 |
US Phone Directory: (303) 427-3***
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