Area Codes
| 650 | California (San Mateo, Palo Alto, Redwood City, Menlo Park, Mountain View and southern San Francisco suburbs) | More information at: Area Code 650 Phone Number Blocks
| 650 | California (San Mateo, Palo Alto, Redwood City, Menlo Park, Mountain View and southern San Francisco suburbs) | More information at: Area Code 650 Phone Number Blocks