| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 881-50** | (510) 881-5000 - (510) 881-5098 | 55 |
| (510) 881-51** | (510) 881-5100 - (510) 881-5199 | 66 |
| (510) 881-52** | (510) 881-5200 - (510) 881-5299 | 64 |
| (510) 881-53** | (510) 881-5300 - (510) 881-5399 | 57 |
| (510) 881-54** | (510) 881-5401 - (510) 881-5499 | 66 |
| (510) 881-55** | (510) 881-5500 - (510) 881-5596 | 57 |
| (510) 881-56** | (510) 881-5600 - (510) 881-5696 | 56 |
| (510) 881-57** | (510) 881-5700 - (510) 881-5799 | 57 |
| (510) 881-58** | (510) 881-5800 - (510) 881-5899 | 57 |
| (510) 881-59** | (510) 881-5901 - (510) 881-5998 | 51 |
US Phone Directory: (510) 881-5***
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