| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (925) 837-50** | (925) 837-5000 - (925) 837-5099 | 60 |
| (925) 837-51** | (925) 837-5100 - (925) 837-5197 | 57 |
| (925) 837-52** | (925) 837-5200 - (925) 837-5299 | 70 |
| (925) 837-53** | (925) 837-5300 - (925) 837-5393 | 44 |
| (925) 837-54** | (925) 837-5400 - (925) 837-5497 | 58 |
| (925) 837-55** | (925) 837-5500 - (925) 837-5598 | 54 |
| (925) 837-56** | (925) 837-5600 - (925) 837-5699 | 51 |
| (925) 837-57** | (925) 837-5701 - (925) 837-5797 | 56 |
| (925) 837-58** | (925) 837-5800 - (925) 837-5898 | 50 |
| (925) 837-59** | (925) 837-5902 - (925) 837-5998 | 56 |
US Phone Directory: (925) 837-5***
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