| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 261-40** | (510) 261-4000 - (510) 261-4099 | 83 |
| (510) 261-41** | (510) 261-4100 - (510) 261-4199 | 75 |
| (510) 261-42** | (510) 261-4200 - (510) 261-4299 | 78 |
| (510) 261-43** | (510) 261-4300 - (510) 261-4399 | 72 |
| (510) 261-44** | (510) 261-4400 - (510) 261-4498 | 63 |
| (510) 261-45** | (510) 261-4500 - (510) 261-4599 | 81 |
| (510) 261-46** | (510) 261-4600 - (510) 261-4699 | 82 |
| (510) 261-47** | (510) 261-4700 - (510) 261-4799 | 68 |
| (510) 261-48** | (510) 261-4800 - (510) 261-4899 | 71 |
| (510) 261-49** | (510) 261-4900 - (510) 261-4999 | 82 |
US Phone Directory: (510) 261-4***
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