| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 657-50** | (510) 657-5000 - (510) 657-5099 | 59 |
| (510) 657-51** | (510) 657-5100 - (510) 657-5198 | 58 |
| (510) 657-52** | (510) 657-5200 - (510) 657-5299 | 58 |
| (510) 657-53** | (510) 657-5301 - (510) 657-5397 | 46 |
| (510) 657-54** | (510) 657-5400 - (510) 657-5499 | 64 |
| (510) 657-55** | (510) 657-5500 - (510) 657-5599 | 59 |
| (510) 657-56** | (510) 657-5600 - (510) 657-5698 | 65 |
| (510) 657-57** | (510) 657-5700 - (510) 657-5799 | 55 |
| (510) 657-58** | (510) 657-5800 - (510) 657-5899 | 46 |
| (510) 657-59** | (510) 657-5900 - (510) 657-5998 | 52 |
US Phone Directory: (510) 657-5***
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