| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 377-30** | (303) 377-3000 - (303) 377-3099 | 71 |
| (303) 377-31** | (303) 377-3100 - (303) 377-3199 | 77 |
| (303) 377-32** | (303) 377-3200 - (303) 377-3298 | 73 |
| (303) 377-33** | (303) 377-3300 - (303) 377-3399 | 84 |
| (303) 377-34** | (303) 377-3400 - (303) 377-3499 | 80 |
| (303) 377-35** | (303) 377-3500 - (303) 377-3599 | 78 |
| (303) 377-36** | (303) 377-3600 - (303) 377-3699 | 77 |
| (303) 377-37** | (303) 377-3700 - (303) 377-3799 | 81 |
| (303) 377-38** | (303) 377-3800 - (303) 377-3899 | 74 |
| (303) 377-39** | (303) 377-3900 - (303) 377-3999 | 84 |
US Phone Directory: (303) 377-3***
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