| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 770-80** | (510) 770-8000 - (510) 770-8088 | 7 |
| (510) 770-81** | (510) 770-8115 - (510) 770-8181 | 10 |
| (510) 770-83** | (510) 770-8300 - (510) 770-8396 | 4 |
| (510) 770-84** | (510) 770-8420 - (510) 770-8490 | 4 |
| (510) 770-85** | (510) 770-8500 - (510) 770-8597 | 56 |
| (510) 770-86** | (510) 770-8600 - (510) 770-8697 | 53 |
| (510) 770-87** | (510) 770-8700 - (510) 770-8798 | 56 |
| (510) 770-88** | (510) 770-8800 - (510) 770-8899 | 66 |
| (510) 770-89** | (510) 770-8900 - (510) 770-8999 | 54 |
US Phone Directory: (510) 770-8***
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