| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 777-50** | (303) 777-5000 - (303) 777-5099 | 75 |
| (303) 777-51** | (303) 777-5100 - (303) 777-5199 | 78 |
| (303) 777-52** | (303) 777-5200 - (303) 777-5299 | 84 |
| (303) 777-53** | (303) 777-5301 - (303) 777-5399 | 67 |
| (303) 777-54** | (303) 777-5400 - (303) 777-5497 | 77 |
| (303) 777-55** | (303) 777-5500 - (303) 777-5599 | 80 |
| (303) 777-56** | (303) 777-5600 - (303) 777-5699 | 72 |
| (303) 777-57** | (303) 777-5700 - (303) 777-5798 | 71 |
| (303) 777-58** | (303) 777-5800 - (303) 777-5899 | 74 |
| (303) 777-59** | (303) 777-5900 - (303) 777-5996 | 71 |
US Phone Directory: (303) 777-5***
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