| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 220-50** | (303) 220-5001 - (303) 220-5093 | 31 |
| (303) 220-51** | (303) 220-5100 - (303) 220-5198 | 29 |
| (303) 220-52** | (303) 220-5200 - (303) 220-5299 | 31 |
| (303) 220-53** | (303) 220-5300 - (303) 220-5399 | 38 |
| (303) 220-54** | (303) 220-5400 - (303) 220-5499 | 45 |
| (303) 220-55** | (303) 220-5500 - (303) 220-5595 | 55 |
| (303) 220-56** | (303) 220-5600 - (303) 220-5699 | 42 |
| (303) 220-57** | (303) 220-5700 - (303) 220-5795 | 42 |
| (303) 220-58** | (303) 220-5800 - (303) 220-5899 | 42 |
| (303) 220-59** | (303) 220-5900 - (303) 220-5995 | 42 |
US Phone Directory: (303) 220-5***
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