| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 973-40** | (303) 973-4000 - (303) 973-4099 | 73 |
| (303) 973-41** | (303) 973-4100 - (303) 973-4199 | 73 |
| (303) 973-42** | (303) 973-4200 - (303) 973-4299 | 80 |
| (303) 973-43** | (303) 973-4302 - (303) 973-4399 | 76 |
| (303) 973-44** | (303) 973-4400 - (303) 973-4498 | 76 |
| (303) 973-45** | (303) 973-4500 - (303) 973-4599 | 66 |
| (303) 973-46** | (303) 973-4600 - (303) 973-4699 | 80 |
| (303) 973-47** | (303) 973-4700 - (303) 973-4799 | 78 |
| (303) 973-48** | (303) 973-4800 - (303) 973-4899 | 70 |
| (303) 973-49** | (303) 973-4900 - (303) 973-4999 | 71 |
US Phone Directory: (303) 973-4***
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