| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 770-40** | (303) 770-4000 - (303) 770-4098 | 68 |
| (303) 770-41** | (303) 770-4101 - (303) 770-4199 | 67 |
| (303) 770-42** | (303) 770-4200 - (303) 770-4299 | 71 |
| (303) 770-43** | (303) 770-4300 - (303) 770-4399 | 66 |
| (303) 770-44** | (303) 770-4400 - (303) 770-4497 | 59 |
| (303) 770-45** | (303) 770-4500 - (303) 770-4597 | 58 |
| (303) 770-46** | (303) 770-4600 - (303) 770-4698 | 66 |
| (303) 770-47** | (303) 770-4700 - (303) 770-4799 | 58 |
| (303) 770-48** | (303) 770-4800 - (303) 770-4899 | 57 |
| (303) 770-49** | (303) 770-4900 - (303) 770-4999 | 69 |
US Phone Directory: (303) 770-4***
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