| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (415) 431-50** | (415) 431-5000 - (415) 431-5099 | 42 |
| (415) 431-51** | (415) 431-5100 - (415) 431-5188 | 32 |
| (415) 431-52** | (415) 431-5200 - (415) 431-5299 | 45 |
| (415) 431-53** | (415) 431-5300 - (415) 431-5399 | 33 |
| (415) 431-54** | (415) 431-5400 - (415) 431-5499 | 34 |
| (415) 431-55** | (415) 431-5502 - (415) 431-5597 | 51 |
| (415) 431-56** | (415) 431-5600 - (415) 431-5697 | 43 |
| (415) 431-57** | (415) 431-5705 - (415) 431-5798 | 45 |
| (415) 431-58** | (415) 431-5801 - (415) 431-5896 | 40 |
| (415) 431-59** | (415) 431-5900 - (415) 431-5996 | 32 |
US Phone Directory: (415) 431-5***
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