| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 777-40** | (303) 777-4000 - (303) 777-4099 | 70 |
| (303) 777-41** | (303) 777-4100 - (303) 777-4199 | 69 |
| (303) 777-42** | (303) 777-4200 - (303) 777-4299 | 71 |
| (303) 777-43** | (303) 777-4300 - (303) 777-4399 | 65 |
| (303) 777-44** | (303) 777-4400 - (303) 777-4499 | 52 |
| (303) 777-45** | (303) 777-4500 - (303) 777-4599 | 63 |
| (303) 777-46** | (303) 777-4600 - (303) 777-4699 | 67 |
| (303) 777-47** | (303) 777-4703 - (303) 777-4799 | 55 |
| (303) 777-48** | (303) 777-4804 - (303) 777-4899 | 55 |
| (303) 777-49** | (303) 777-4900 - (303) 777-4997 | 46 |
US Phone Directory: (303) 777-4***
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