| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 504-40** | (303) 504-4000 - (303) 504-4096 | 45 |
| (303) 504-41** | (303) 504-4100 - (303) 504-4197 | 41 |
| (303) 504-42** | (303) 504-4200 - (303) 504-4299 | 50 |
| (303) 504-43** | (303) 504-4300 - (303) 504-4399 | 47 |
| (303) 504-44** | (303) 504-4401 - (303) 504-4499 | 56 |
| (303) 504-45** | (303) 504-4502 - (303) 504-4597 | 50 |
| (303) 504-46** | (303) 504-4600 - (303) 504-4697 | 46 |
| (303) 504-47** | (303) 504-4700 - (303) 504-4795 | 45 |
| (303) 504-48** | (303) 504-4800 - (303) 504-4899 | 45 |
| (303) 504-49** | (303) 504-4900 - (303) 504-4998 | 45 |
US Phone Directory: (303) 504-4***
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