| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 337-40** | (303) 337-4001 - (303) 337-4099 | 88 |
| (303) 337-41** | (303) 337-4100 - (303) 337-4199 | 87 |
| (303) 337-42** | (303) 337-4200 - (303) 337-4299 | 77 |
| (303) 337-43** | (303) 337-4300 - (303) 337-4399 | 80 |
| (303) 337-44** | (303) 337-4400 - (303) 337-4499 | 89 |
| (303) 337-45** | (303) 337-4500 - (303) 337-4599 | 85 |
| (303) 337-46** | (303) 337-4600 - (303) 337-4698 | 78 |
| (303) 337-47** | (303) 337-4700 - (303) 337-4798 | 86 |
| (303) 337-48** | (303) 337-4800 - (303) 337-4899 | 82 |
| (303) 337-49** | (303) 337-4901 - (303) 337-4999 | 86 |
US Phone Directory: (303) 337-4***
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