| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (925) 931-50** | (925) 931-5001 - (925) 931-5056 | 10 |
| (925) 931-51** | (925) 931-5100 - (925) 931-5191 | 4 |
| (925) 931-52** | (925) 931-5208 - (925) 931-5251 | 3 |
| (925) 931-53** | (925) 931-5300 - (925) 931-5393 | 10 |
| (925) 931-54** | (925) 931-5400 - (925) 931-5483 | 11 |
| (925) 931-55** | (925) 931-5500 - (925) 931-5565 | 5 |
| (925) 931-56** | (925) 931-5600 - (925) 931-5698 | 9 |
US Phone Directory: (925) 931-5***
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