| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 278-60** | (510) 278-6001 - (510) 278-6098 | 60 |
| (510) 278-61** | (510) 278-6100 - (510) 278-6197 | 62 |
| (510) 278-62** | (510) 278-6200 - (510) 278-6298 | 52 |
| (510) 278-63** | (510) 278-6301 - (510) 278-6399 | 60 |
| (510) 278-64** | (510) 278-6403 - (510) 278-6499 | 57 |
| (510) 278-65** | (510) 278-6501 - (510) 278-6599 | 62 |
| (510) 278-66** | (510) 278-6602 - (510) 278-6697 | 63 |
| (510) 278-67** | (510) 278-6700 - (510) 278-6798 | 58 |
| (510) 278-68** | (510) 278-6801 - (510) 278-6899 | 65 |
| (510) 278-69** | (510) 278-6900 - (510) 278-6998 | 62 |
US Phone Directory: (510) 278-6***
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