| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 870-40** | (303) 870-4000 - (303) 870-4099 | 42 |
| (303) 870-41** | (303) 870-4100 - (303) 870-4199 | 43 |
| (303) 870-42** | (303) 870-4201 - (303) 870-4299 | 41 |
| (303) 870-43** | (303) 870-4300 - (303) 870-4399 | 39 |
| (303) 870-44** | (303) 870-4402 - (303) 870-4497 | 51 |
| (303) 870-45** | (303) 870-4503 - (303) 870-4599 | 49 |
| (303) 870-46** | (303) 870-4600 - (303) 870-4699 | 45 |
| (303) 870-47** | (303) 870-4700 - (303) 870-4799 | 55 |
| (303) 870-48** | (303) 870-4804 - (303) 870-4898 | 58 |
| (303) 870-49** | (303) 870-4900 - (303) 870-4999 | 40 |
US Phone Directory: (303) 870-4***
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