| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (303) 399-90** | (303) 399-9000 - (303) 399-9098 | 52 |
| (303) 399-91** | (303) 399-9100 - (303) 399-9199 | 56 |
| (303) 399-92** | (303) 399-9200 - (303) 399-9298 | 50 |
| (303) 399-93** | (303) 399-9300 - (303) 399-9399 | 44 |
| (303) 399-94** | (303) 399-9401 - (303) 399-9496 | 58 |
| (303) 399-95** | (303) 399-9500 - (303) 399-9599 | 57 |
| (303) 399-96** | (303) 399-9600 - (303) 399-9699 | 54 |
| (303) 399-97** | (303) 399-9700 - (303) 399-9799 | 52 |
| (303) 399-98** | (303) 399-9800 - (303) 399-9899 | 52 |
| (303) 399-99** | (303) 399-9900 - (303) 399-9999 | 67 |
US Phone Directory: (303) 399-9***
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