| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 440-30** | (303) 440-3000 - (303) 440-3093 | 18 |
| (303) 440-31** | (303) 440-3100 - (303) 440-3176 | 13 |
| (303) 440-32** | (303) 440-3200 - (303) 440-3291 | 11 |
| (303) 440-33** | (303) 440-3300 - (303) 440-3399 | 79 |
| (303) 440-34** | (303) 440-3400 - (303) 440-3499 | 76 |
| (303) 440-35** | (303) 440-3500 - (303) 440-3599 | 82 |
| (303) 440-36** | (303) 440-3600 - (303) 440-3699 | 76 |
| (303) 440-37** | (303) 440-3700 - (303) 440-3799 | 76 |
| (303) 440-38** | (303) 440-3800 - (303) 440-3899 | 78 |
| (303) 440-39** | (303) 440-3901 - (303) 440-3998 | 63 |
US Phone Directory: (303) 440-3***
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