| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 487-50** | (510) 487-5000 - (510) 487-5098 | 56 |
| (510) 487-51** | (510) 487-5105 - (510) 487-5198 | 49 |
| (510) 487-52** | (510) 487-5200 - (510) 487-5298 | 43 |
| (510) 487-53** | (510) 487-5305 - (510) 487-5399 | 43 |
| (510) 487-54** | (510) 487-5401 - (510) 487-5498 | 49 |
| (510) 487-55** | (510) 487-5500 - (510) 487-5597 | 52 |
| (510) 487-56** | (510) 487-5600 - (510) 487-5699 | 41 |
| (510) 487-57** | (510) 487-5700 - (510) 487-5798 | 52 |
| (510) 487-58** | (510) 487-5801 - (510) 487-5899 | 38 |
| (510) 487-59** | (510) 487-5900 - (510) 487-5996 | 32 |
US Phone Directory: (510) 487-5***
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