| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (925) 577-40** | (925) 577-4000 - (925) 577-4091 | 9 |
| (925) 577-41** | (925) 577-4108 - (925) 577-4195 | 11 |
| (925) 577-42** | (925) 577-4206 - (925) 577-4287 | 7 |
| (925) 577-43** | (925) 577-4312 - (925) 577-4364 | 4 |
| (925) 577-44** | (925) 577-4418 - (925) 577-4496 | 10 |
| (925) 577-45** | (925) 577-4505 - (925) 577-4598 | 6 |
| (925) 577-46** | (925) 577-4603 - (925) 577-4672 | 7 |
| (925) 577-47** | (925) 577-4703 - (925) 577-4777 | 7 |
| (925) 577-48** | (925) 577-4800 - (925) 577-4887 | 7 |
| (925) 577-49** | (925) 577-4911 - (925) 577-4997 | 10 |
US Phone Directory: (925) 577-4***
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