| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 531-30** | (510) 531-3000 - (510) 531-3099 | 76 |
| (510) 531-31** | (510) 531-3100 - (510) 531-3199 | 74 |
| (510) 531-32** | (510) 531-3200 - (510) 531-3298 | 76 |
| (510) 531-33** | (510) 531-3300 - (510) 531-3399 | 68 |
| (510) 531-34** | (510) 531-3400 - (510) 531-3498 | 80 |
| (510) 531-35** | (510) 531-3505 - (510) 531-3599 | 75 |
| (510) 531-36** | (510) 531-3600 - (510) 531-3698 | 82 |
| (510) 531-37** | (510) 531-3701 - (510) 531-3799 | 74 |
| (510) 531-38** | (510) 531-3800 - (510) 531-3899 | 73 |
| (510) 531-39** | (510) 531-3900 - (510) 531-3999 | 80 |
US Phone Directory: (510) 531-3***
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