| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (415) 931-50** | (415) 931-5000 - (415) 931-5099 | 60 |
| (415) 931-51** | (415) 931-5100 - (415) 931-5198 | 65 |
| (415) 931-52** | (415) 931-5200 - (415) 931-5298 | 59 |
| (415) 931-53** | (415) 931-5300 - (415) 931-5399 | 57 |
| (415) 931-54** | (415) 931-5400 - (415) 931-5499 | 66 |
| (415) 931-55** | (415) 931-5500 - (415) 931-5599 | 69 |
| (415) 931-56** | (415) 931-5600 - (415) 931-5699 | 55 |
| (415) 931-57** | (415) 931-5700 - (415) 931-5797 | 63 |
| (415) 931-58** | (415) 931-5801 - (415) 931-5899 | 65 |
| (415) 931-59** | (415) 931-5901 - (415) 931-5999 | 71 |
US Phone Directory: (415) 931-5***
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