| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 525-70** | (510) 525-7000 - (510) 525-7099 | 81 |
| (510) 525-71** | (510) 525-7100 - (510) 525-7199 | 81 |
| (510) 525-72** | (510) 525-7201 - (510) 525-7297 | 72 |
| (510) 525-73** | (510) 525-7300 - (510) 525-7399 | 76 |
| (510) 525-74** | (510) 525-7400 - (510) 525-7499 | 77 |
| (510) 525-75** | (510) 525-7501 - (510) 525-7598 | 80 |
| (510) 525-76** | (510) 525-7600 - (510) 525-7699 | 77 |
| (510) 525-77** | (510) 525-7700 - (510) 525-7799 | 84 |
| (510) 525-78** | (510) 525-7800 - (510) 525-7899 | 87 |
| (510) 525-79** | (510) 525-7901 - (510) 525-7999 | 82 |
US Phone Directory: (510) 525-7***
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