| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 525-80** | (510) 525-8000 - (510) 525-8099 | 74 |
| (510) 525-81** | (510) 525-8100 - (510) 525-8199 | 65 |
| (510) 525-82** | (510) 525-8200 - (510) 525-8298 | 55 |
| (510) 525-83** | (510) 525-8300 - (510) 525-8399 | 79 |
| (510) 525-84** | (510) 525-8400 - (510) 525-8498 | 64 |
| (510) 525-85** | (510) 525-8500 - (510) 525-8599 | 78 |
| (510) 525-86** | (510) 525-8600 - (510) 525-8699 | 64 |
| (510) 525-87** | (510) 525-8700 - (510) 525-8798 | 72 |
| (510) 525-88** | (510) 525-8800 - (510) 525-8899 | 78 |
| (510) 525-89** | (510) 525-8900 - (510) 525-8999 | 68 |
US Phone Directory: (510) 525-8***
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