| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 553-90** | (510) 553-9000 - (510) 553-9099 | 44 |
| (510) 553-91** | (510) 553-9100 - (510) 553-9199 | 59 |
| (510) 553-92** | (510) 553-9200 - (510) 553-9298 | 50 |
| (510) 553-93** | (510) 553-9300 - (510) 553-9399 | 55 |
| (510) 553-94** | (510) 553-9400 - (510) 553-9499 | 53 |
| (510) 553-95** | (510) 553-9500 - (510) 553-9599 | 50 |
| (510) 553-96** | (510) 553-9600 - (510) 553-9698 | 46 |
| (510) 553-97** | (510) 553-9700 - (510) 553-9799 | 58 |
| (510) 553-98** | (510) 553-9800 - (510) 553-9898 | 47 |
| (510) 553-99** | (510) 553-9901 - (510) 553-9999 | 59 |
US Phone Directory: (510) 553-9***
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