| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 447-50** | (510) 447-5014 - (510) 447-5099 | 4 |
| (510) 447-51** | (510) 447-5120 - (510) 447-5173 | 8 |
| (510) 447-52** | (510) 447-5229 - (510) 447-5290 | 7 |
| (510) 447-53** | (510) 447-5312 - (510) 447-5339 | 4 |
| (510) 447-54** | (510) 447-5411 - (510) 447-5493 | 5 |
| (510) 447-55** | (510) 447-5513 - (510) 447-5584 | 3 |
| (510) 447-56** | (510) 447-5616 - (510) 447-5672 | 6 |
| (510) 447-57** | (510) 447-5739 - (510) 447-5797 | 4 |
| (510) 447-58** | (510) 447-5801 - (510) 447-5898 | 7 |
| (510) 447-59** | (510) 447-5904 - (510) 447-5971 | 8 |
US Phone Directory: (510) 447-5***
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