| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 444-50** | (510) 444-5000 - (510) 444-5097 | 54 |
| (510) 444-51** | (510) 444-5100 - (510) 444-5199 | 63 |
| (510) 444-52** | (510) 444-5201 - (510) 444-5298 | 51 |
| (510) 444-53** | (510) 444-5300 - (510) 444-5395 | 48 |
| (510) 444-54** | (510) 444-5400 - (510) 444-5499 | 47 |
| (510) 444-55** | (510) 444-5500 - (510) 444-5594 | 50 |
| (510) 444-56** | (510) 444-5600 - (510) 444-5697 | 50 |
| (510) 444-57** | (510) 444-5700 - (510) 444-5799 | 40 |
| (510) 444-58** | (510) 444-5800 - (510) 444-5899 | 44 |
| (510) 444-59** | (510) 444-5900 - (510) 444-5998 | 29 |
US Phone Directory: (510) 444-5***
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