| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 221-40** | (303) 221-4000 - (303) 221-4099 | 63 |
| (303) 221-41** | (303) 221-4100 - (303) 221-4199 | 71 |
| (303) 221-42** | (303) 221-4200 - (303) 221-4297 | 62 |
| (303) 221-43** | (303) 221-4300 - (303) 221-4399 | 67 |
| (303) 221-44** | (303) 221-4400 - (303) 221-4499 | 74 |
| (303) 221-45** | (303) 221-4500 - (303) 221-4598 | 66 |
| (303) 221-46** | (303) 221-4600 - (303) 221-4699 | 61 |
| (303) 221-47** | (303) 221-4700 - (303) 221-4798 | 53 |
| (303) 221-48** | (303) 221-4802 - (303) 221-4899 | 69 |
| (303) 221-49** | (303) 221-4900 - (303) 221-4998 | 65 |
US Phone Directory: (303) 221-4***
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