| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (415) 440-50** | (415) 440-5000 - (415) 440-5097 | 58 |
| (415) 440-51** | (415) 440-5100 - (415) 440-5198 | 46 |
| (415) 440-52** | (415) 440-5200 - (415) 440-5295 | 58 |
| (415) 440-53** | (415) 440-5300 - (415) 440-5399 | 38 |
| (415) 440-54** | (415) 440-5400 - (415) 440-5499 | 41 |
| (415) 440-55** | (415) 440-5500 - (415) 440-5599 | 55 |
| (415) 440-56** | (415) 440-5600 - (415) 440-5699 | 49 |
| (415) 440-57** | (415) 440-5701 - (415) 440-5797 | 46 |
| (415) 440-58** | (415) 440-5800 - (415) 440-5894 | 50 |
| (415) 440-59** | (415) 440-5909 - (415) 440-5998 | 38 |
US Phone Directory: (415) 440-5***
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