| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 523-30** | (303) 523-3001 - (303) 523-3098 | 37 |
| (303) 523-31** | (303) 523-3103 - (303) 523-3198 | 32 |
| (303) 523-32** | (303) 523-3200 - (303) 523-3293 | 31 |
| (303) 523-33** | (303) 523-3300 - (303) 523-3399 | 48 |
| (303) 523-34** | (303) 523-3406 - (303) 523-3499 | 43 |
| (303) 523-35** | (303) 523-3503 - (303) 523-3598 | 37 |
| (303) 523-36** | (303) 523-3601 - (303) 523-3697 | 36 |
| (303) 523-37** | (303) 523-3701 - (303) 523-3798 | 37 |
| (303) 523-38** | (303) 523-3800 - (303) 523-3898 | 45 |
| (303) 523-39** | (303) 523-3905 - (303) 523-3998 | 42 |
US Phone Directory: (303) 523-3***
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