| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 442-30** | (303) 442-3000 - (303) 442-3098 | 78 |
| (303) 442-31** | (303) 442-3100 - (303) 442-3199 | 76 |
| (303) 442-32** | (303) 442-3200 - (303) 442-3298 | 80 |
| (303) 442-33** | (303) 442-3300 - (303) 442-3399 | 77 |
| (303) 442-34** | (303) 442-3400 - (303) 442-3498 | 79 |
| (303) 442-35** | (303) 442-3500 - (303) 442-3599 | 77 |
| (303) 442-36** | (303) 442-3600 - (303) 442-3699 | 71 |
| (303) 442-37** | (303) 442-3700 - (303) 442-3799 | 75 |
| (303) 442-38** | (303) 442-3800 - (303) 442-3899 | 77 |
| (303) 442-39** | (303) 442-3900 - (303) 442-3999 | 71 |
US Phone Directory: (303) 442-3***
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