Area code 650
Area code 650 serves San Mateo and nearby parts of California, including Redwood City, Palo Alto and Mountain View. It is on Pacific Time, which observes daylight saving time.
Area code 650 at a glance
| State | California (CA) |
| Main city | San Mateo |
| Time zone | Pacific Time |
| UTC offset | UTC−8 in winter, UTC−7 in summer |
| Daylight saving time | Yes |
Cities in 650
- San Mateo
- Redwood City
- Palo Alto
- Mountain View
An area code shows where a number was first assigned. Mobile numbers keep their area code when people move, so the person you’re calling may be somewhere else.
When you can call a 650 number
Federal telemarketing rules under the TCPA allow sales calls between 8 AM and 9 PM in the called person’s local time. Here is that window for a 650 number, shown in your own time zone.
General information, not legal advice. Some states add rules for Sundays, holidays or the number of calls. See our calling hours guide.
| If you’re on | You can call 650 between |
|---|---|
| Eastern | 11:00 AM to 12:00 AM |
| Central | 10:00 AM to 11:00 PM |
| Mountain | 9:00 AM to 10:00 PM |
| Arizona | 8:00 AM to 9:00 PM |
| Pacific | 8:00 AM to 9:00 PM |
See the time in 650 without leaving your CRM
Parse is a free Chrome extension that shows the local time and weather beside every phone number on the page.
Other area codes in California
Questions about 650
What time zone is area code 650?
Area code 650 is on Pacific Time. It observes daylight saving time.
Where is area code 650?
Area code 650 is in California. Its main city is San Mateo, and it also covers Redwood City, Palo Alto and Mountain View.
What are the legal hours to call a 650 number?
Under the federal TCPA, sales calls are allowed from 8 AM to 9 PM in the called person’s local time. Personal and informational calls are not limited by these hours.