| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 537-40** | (303) 537-4000 - (303) 537-4098 | 92 |
| (303) 537-41** | (303) 537-4100 - (303) 537-4199 | 92 |
| (303) 537-42** | (303) 537-4200 - (303) 537-4299 | 93 |
| (303) 537-43** | (303) 537-4300 - (303) 537-4399 | 94 |
| (303) 537-44** | (303) 537-4401 - (303) 537-4499 | 90 |
| (303) 537-45** | (303) 537-4500 - (303) 537-4599 | 93 |
| (303) 537-46** | (303) 537-4600 - (303) 537-4699 | 90 |
| (303) 537-47** | (303) 537-4700 - (303) 537-4799 | 91 |
| (303) 537-48** | (303) 537-4800 - (303) 537-4899 | 90 |
| (303) 537-49** | (303) 537-4901 - (303) 537-4998 | 87 |
US Phone Directory: (303) 537-4***
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