| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 388-50** | (510) 388-5008 - (510) 388-5099 | 8 |
| (510) 388-51** | (510) 388-5134 - (510) 388-5185 | 4 |
| (510) 388-52** | (510) 388-5224 - (510) 388-5297 | 6 |
| (510) 388-53** | (510) 388-5329 - (510) 388-5340 | 4 |
| (510) 388-54** | (510) 388-5422 - (510) 388-5483 | 4 |
| (510) 388-55** | (510) 388-5500 - (510) 388-5599 | 9 |
| (510) 388-56** | (510) 388-5620 - (510) 388-5690 | 4 |
| (510) 388-57** | (510) 388-5726 - (510) 388-5788 | 7 |
| (510) 388-58** | (510) 388-5823 - (510) 388-5899 | 6 |
| (510) 388-59** | (510) 388-5906 - (510) 388-5991 | 8 |
US Phone Directory: (510) 388-5***
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