| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 638-00** | (510) 638-0000 - (510) 638-0081 | 7 |
| (510) 638-01** | (510) 638-0100 - (510) 638-0196 | 55 |
| (510) 638-02** | (510) 638-0200 - (510) 638-0299 | 62 |
| (510) 638-03** | (510) 638-0301 - (510) 638-0399 | 54 |
| (510) 638-04** | (510) 638-0400 - (510) 638-0497 | 46 |
| (510) 638-05** | (510) 638-0502 - (510) 638-0599 | 44 |
| (510) 638-06** | (510) 638-0601 - (510) 638-0697 | 55 |
| (510) 638-07** | (510) 638-0700 - (510) 638-0799 | 51 |
| (510) 638-08** | (510) 638-0807 - (510) 638-0899 | 57 |
| (510) 638-09** | (510) 638-0900 - (510) 638-0997 | 42 |
US Phone Directory: (510) 638-0***
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