| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 440-80** | (510) 440-8000 - (510) 440-8095 | 52 |
| (510) 440-81** | (510) 440-8100 - (510) 440-8199 | 60 |
| (510) 440-82** | (510) 440-8200 - (510) 440-8299 | 64 |
| (510) 440-83** | (510) 440-8300 - (510) 440-8397 | 73 |
| (510) 440-84** | (510) 440-8400 - (510) 440-8499 | 69 |
| (510) 440-85** | (510) 440-8500 - (510) 440-8599 | 67 |
| (510) 440-86** | (510) 440-8600 - (510) 440-8699 | 53 |
| (510) 440-87** | (510) 440-8700 - (510) 440-8799 | 62 |
| (510) 440-88** | (510) 440-8800 - (510) 440-8898 | 67 |
| (510) 440-89** | (510) 440-8900 - (510) 440-8998 | 70 |
US Phone Directory: (510) 440-8***
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