| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 420-80** | (510) 420-8000 - (510) 420-8099 | 62 |
| (510) 420-81** | (510) 420-8100 - (510) 420-8199 | 57 |
| (510) 420-83** | (510) 420-8331 - (510) 420-8388 | 3 |
| (510) 420-84** | (510) 420-8400 - (510) 420-8498 | 61 |
| (510) 420-86** | (510) 420-8600 - (510) 420-8699 | 58 |
| (510) 420-87** | (510) 420-8700 - (510) 420-8799 | 54 |
| (510) 420-88** | (510) 420-8800 - (510) 420-8899 | 65 |
| (510) 420-89** | (510) 420-8900 - (510) 420-8997 | 62 |
US Phone Directory: (510) 420-8***
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