| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 270-80** | (510) 270-8000 - (510) 270-8099 | 73 |
| (510) 270-81** | (510) 270-8112 - (510) 270-8112 | 1 |
| (510) 270-82** | (510) 270-8200 - (510) 270-8298 | 74 |
| (510) 270-83** | (510) 270-8300 - (510) 270-8399 | 71 |
| (510) 270-84** | (510) 270-8401 - (510) 270-8497 | 60 |
| (510) 270-85** | (510) 270-8501 - (510) 270-8592 | 29 |
| (510) 270-86** | (510) 270-8615 - (510) 270-8632 | 3 |
| (510) 270-87** | (510) 270-8739 - (510) 270-8739 | 1 |
| (510) 270-88** | (510) 270-8800 - (510) 270-8888 | 12 |
| (510) 270-89** | (510) 270-8902 - (510) 270-8938 | 16 |
US Phone Directory: (510) 270-8***
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