| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 638-50** | (510) 638-5000 - (510) 638-5098 | 59 |
| (510) 638-51** | (510) 638-5100 - (510) 638-5198 | 59 |
| (510) 638-52** | (510) 638-5200 - (510) 638-5299 | 64 |
| (510) 638-53** | (510) 638-5300 - (510) 638-5398 | 51 |
| (510) 638-54** | (510) 638-5402 - (510) 638-5499 | 53 |
| (510) 638-55** | (510) 638-5500 - (510) 638-5598 | 61 |
| (510) 638-56** | (510) 638-5601 - (510) 638-5698 | 54 |
| (510) 638-57** | (510) 638-5700 - (510) 638-5798 | 59 |
| (510) 638-58** | (510) 638-5800 - (510) 638-5899 | 56 |
| (510) 638-59** | (510) 638-5900 - (510) 638-5999 | 61 |
US Phone Directory: (510) 638-5***
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