| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 638-10** | (510) 638-1000 - (510) 638-1099 | 73 |
| (510) 638-11** | (510) 638-1100 - (510) 638-1199 | 59 |
| (510) 638-12** | (510) 638-1200 - (510) 638-1299 | 78 |
| (510) 638-13** | (510) 638-1300 - (510) 638-1398 | 61 |
| (510) 638-14** | (510) 638-1400 - (510) 638-1499 | 73 |
| (510) 638-15** | (510) 638-1500 - (510) 638-1599 | 72 |
| (510) 638-16** | (510) 638-1601 - (510) 638-1699 | 77 |
| (510) 638-17** | (510) 638-1700 - (510) 638-1799 | 67 |
| (510) 638-18** | (510) 638-1800 - (510) 638-1899 | 75 |
| (510) 638-19** | (510) 638-1900 - (510) 638-1999 | 70 |
US Phone Directory: (510) 638-1***
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