| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 604-20** | (510) 604-2005 - (510) 604-2099 | 22 |
| (510) 604-21** | (510) 604-2101 - (510) 604-2189 | 15 |
| (510) 604-22** | (510) 604-2202 - (510) 604-2298 | 20 |
| (510) 604-23** | (510) 604-2301 - (510) 604-2396 | 19 |
| (510) 604-24** | (510) 604-2405 - (510) 604-2492 | 7 |
| (510) 604-25** | (510) 604-2505 - (510) 604-2597 | 6 |
| (510) 604-26** | (510) 604-2603 - (510) 604-2698 | 26 |
| (510) 604-27** | (510) 604-2701 - (510) 604-2796 | 17 |
| (510) 604-28** | (510) 604-2816 - (510) 604-2894 | 18 |
| (510) 604-29** | (510) 604-2903 - (510) 604-2999 | 21 |
US Phone Directory: (510) 604-2***
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