| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (650) 557-00** | (650) 557-0000 - (650) 557-0096 | 43 |
| (650) 557-01** | (650) 557-0100 - (650) 557-0199 | 84 |
| (650) 557-02** | (650) 557-0200 - (650) 557-0299 | 84 |
| (650) 557-03** | (650) 557-0303 - (650) 557-0399 | 76 |
| (650) 557-04** | (650) 557-0400 - (650) 557-0499 | 74 |
| (650) 557-05** | (650) 557-0500 - (650) 557-0599 | 84 |
| (650) 557-06** | (650) 557-0601 - (650) 557-0699 | 78 |
| (650) 557-07** | (650) 557-0700 - (650) 557-0799 | 83 |
| (650) 557-08** | (650) 557-0801 - (650) 557-0899 | 84 |
| (650) 557-09** | (650) 557-0900 - (650) 557-0999 | 77 |
US Phone Directory: (650) 557-0***
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