| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 430-20** | (510) 430-2000 - (510) 430-2099 | 12 |
| (510) 430-21** | (510) 430-2108 - (510) 430-2196 | 24 |
| (510) 430-22** | (510) 430-2211 - (510) 430-2296 | 15 |
| (510) 430-23** | (510) 430-2301 - (510) 430-2390 | 11 |
| (510) 430-24** | (510) 430-2400 - (510) 430-2497 | 70 |
| (510) 430-25** | (510) 430-2500 - (510) 430-2599 | 73 |
| (510) 430-26** | (510) 430-2600 - (510) 430-2699 | 71 |
| (510) 430-27** | (510) 430-2700 - (510) 430-2796 | 64 |
| (510) 430-28** | (510) 430-2800 - (510) 430-2899 | 69 |
| (510) 430-29** | (510) 430-2900 - (510) 430-2998 | 53 |
US Phone Directory: (510) 430-2***
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