| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 221-30** | (303) 221-3001 - (303) 221-3099 | 54 |
| (303) 221-31** | (303) 221-3101 - (303) 221-3199 | 58 |
| (303) 221-32** | (303) 221-3200 - (303) 221-3299 | 56 |
| (303) 221-33** | (303) 221-3300 - (303) 221-3398 | 56 |
| (303) 221-34** | (303) 221-3400 - (303) 221-3495 | 51 |
| (303) 221-35** | (303) 221-3500 - (303) 221-3597 | 44 |
| (303) 221-36** | (303) 221-3600 - (303) 221-3698 | 41 |
| (303) 221-37** | (303) 221-3700 - (303) 221-3798 | 44 |
| (303) 221-38** | (303) 221-3800 - (303) 221-3899 | 36 |
| (303) 221-39** | (303) 221-3900 - (303) 221-3999 | 40 |
US Phone Directory: (303) 221-3***
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