| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 623-90** | (510) 623-9000 - (510) 623-9099 | 49 |
| (510) 623-91** | (510) 623-9100 - (510) 623-9199 | 48 |
| (510) 623-92** | (510) 623-9200 - (510) 623-9297 | 66 |
| (510) 623-93** | (510) 623-9300 - (510) 623-9399 | 56 |
| (510) 623-94** | (510) 623-9400 - (510) 623-9496 | 54 |
| (510) 623-95** | (510) 623-9500 - (510) 623-9597 | 50 |
| (510) 623-96** | (510) 623-9600 - (510) 623-9699 | 56 |
| (510) 623-97** | (510) 623-9700 - (510) 623-9797 | 49 |
| (510) 623-98** | (510) 623-9800 - (510) 623-9898 | 51 |
| (510) 623-99** | (510) 623-9902 - (510) 623-9999 | 45 |
US Phone Directory: (510) 623-9***
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