| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (415) 550-10** | (415) 550-1002 - (415) 550-1099 | 66 |
| (415) 550-11** | (415) 550-1100 - (415) 550-1199 | 69 |
| (415) 550-12** | (415) 550-1200 - (415) 550-1299 | 68 |
| (415) 550-13** | (415) 550-1300 - (415) 550-1398 | 70 |
| (415) 550-14** | (415) 550-1400 - (415) 550-1499 | 76 |
| (415) 550-15** | (415) 550-1501 - (415) 550-1598 | 77 |
| (415) 550-16** | (415) 550-1600 - (415) 550-1699 | 71 |
| (415) 550-17** | (415) 550-1700 - (415) 550-1799 | 78 |
| (415) 550-18** | (415) 550-1800 - (415) 550-1899 | 70 |
| (415) 550-19** | (415) 550-1900 - (415) 550-1999 | 80 |
US Phone Directory: (415) 550-1***
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