| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (925) 399-50** | (925) 399-5000 - (925) 399-5099 | 91 |
| (925) 399-51** | (925) 399-5100 - (925) 399-5199 | 87 |
| (925) 399-52** | (925) 399-5200 - (925) 399-5299 | 90 |
| (925) 399-53** | (925) 399-5301 - (925) 399-5399 | 90 |
| (925) 399-54** | (925) 399-5401 - (925) 399-5499 | 84 |
| (925) 399-55** | (925) 399-5500 - (925) 399-5599 | 85 |
| (925) 399-56** | (925) 399-5600 - (925) 399-5699 | 92 |
| (925) 399-57** | (925) 399-5700 - (925) 399-5799 | 82 |
| (925) 399-58** | (925) 399-5800 - (925) 399-5899 | 82 |
| (925) 399-59** | (925) 399-5900 - (925) 399-5999 | 83 |
US Phone Directory: (925) 399-5***
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