| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 278-80** | (510) 278-8000 - (510) 278-8099 | 79 |
| (510) 278-81** | (510) 278-8100 - (510) 278-8199 | 81 |
| (510) 278-82** | (510) 278-8200 - (510) 278-8298 | 78 |
| (510) 278-83** | (510) 278-8300 - (510) 278-8399 | 73 |
| (510) 278-84** | (510) 278-8400 - (510) 278-8499 | 74 |
| (510) 278-85** | (510) 278-8500 - (510) 278-8599 | 85 |
| (510) 278-86** | (510) 278-8600 - (510) 278-8699 | 68 |
| (510) 278-87** | (510) 278-8700 - (510) 278-8799 | 80 |
| (510) 278-88** | (510) 278-8800 - (510) 278-8899 | 78 |
| (510) 278-89** | (510) 278-8900 - (510) 278-8999 | 67 |
US Phone Directory: (510) 278-8***
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