| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 223-70** | (510) 223-7001 - (510) 223-7099 | 70 |
| (510) 223-71** | (510) 223-7100 - (510) 223-7199 | 75 |
| (510) 223-72** | (510) 223-7200 - (510) 223-7299 | 81 |
| (510) 223-73** | (510) 223-7301 - (510) 223-7399 | 72 |
| (510) 223-74** | (510) 223-7400 - (510) 223-7499 | 69 |
| (510) 223-75** | (510) 223-7501 - (510) 223-7598 | 75 |
| (510) 223-76** | (510) 223-7600 - (510) 223-7698 | 73 |
| (510) 223-77** | (510) 223-7700 - (510) 223-7797 | 70 |
| (510) 223-78** | (510) 223-7800 - (510) 223-7899 | 64 |
| (510) 223-79** | (510) 223-7900 - (510) 223-7999 | 71 |
US Phone Directory: (510) 223-7***
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