| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 331-50** | (510) 331-5020 - (510) 331-5090 | 3 |
| (510) 331-51** | (510) 331-5118 - (510) 331-5199 | 5 |
| (510) 331-52** | (510) 331-5216 - (510) 331-5261 | 6 |
| (510) 331-53** | (510) 331-5303 - (510) 331-5397 | 11 |
| (510) 331-54** | (510) 331-5409 - (510) 331-5480 | 4 |
| (510) 331-55** | (510) 331-5517 - (510) 331-5594 | 6 |
| (510) 331-56** | (510) 331-5618 - (510) 331-5665 | 10 |
| (510) 331-57** | (510) 331-5700 - (510) 331-5792 | 6 |
| (510) 331-58** | (510) 331-5831 - (510) 331-5893 | 8 |
| (510) 331-59** | (510) 331-5907 - (510) 331-5998 | 7 |
US Phone Directory: (510) 331-5***
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