650 Area Code
Covers Daly City and nearby communities in California.
(650) 555-0142Area code 650 map
Interactive coverage map for area code 650, centered on Daly City, California
37.7058, -122.4619
Open in OpenStreetMapArea code 650 coverage map — centered on Daly City. Shaded area shows the approximate reach around the primary city.
Area code 650 is a telephone area code in California, anchored on Daly City. It reaches roughly 578,000 people across places such as Daly City, San Mateo, Redwood City, Mountain View and more. The region observes Pacific time, so a number like (650) 555-0142 is on that clock right now. On the ground it spans San Mateo, Santa Clara. It shares its territory with the overlay codes 415, 628, which sit on the exact same map. Because the 650 region uses more than one area code, you must dial all ten digits — area code included — even for a local call. You do not, however, need to dial a leading 1 for calls within the US and Canada. Scroll on for a real-time clock, an area map, the cities and counties inside 650, its related area codes, and practical advice on 650 robocalls and caller-ID spoofing.
Cities covered by 650
Cities & neighborhoods
- Daly City
- San Mateo
- Redwood City
- Mountain View
- Palo Alto
- South San Francisco
- San Bruno
- Pacifica
- Belmont
- Burlingame
- East Palo Alto
- Foster City
- Los Altos
- Menlo Park
- Millbrae
- San Carlos
Nearby & overlay area codes
Overlay codes (same area)
These share 650’s geography — a number in either code can be on the same street.
Neighboring codes
Codes for adjacent regions and metros.
Is a call from 650 a scam?
Area code 650 serves Daly City and the surrounding area, so most calls are ordinary local and business traffic. As everywhere, spam and robocalls do use 650 numbers, frequently by spoofing a local-looking caller ID to boost pickup rates. The area code itself tells you nothing about who is really calling, so judge the call by what's said, not the number.
Red flags to watch for
- Pressure to act right now, or threats of arrest, fines, or service being cut off.
- Requests to pay with gift cards, wire transfer, crypto, or a payment app.
- Asking for passwords, one-time codes, your SSN, or full card/bank numbers.
- A robocall or recording, or a number that won’t let you call back.
When unsure, hang up and call the organization back on a number you look up yourself.
Calling a 650 number from abroad
Every 650 number is a US/Canada +1 number. From a mobile anywhere, the simplest approach is to dial it in international format:
+1 650 555-0142If your phone can’t dial the +, replace it with your country’s exit code, then 1, then the number:
- UK, Germany, France & most of Europe
00 1 650 555-0142 - Australia
0011 1 650 555-0142 - Japan
010 1 650 555-0142 - Mexico
00 1 650 555-0142
Within the US and Canada you don’t need any of this — just dial the ten digits 650 555-0142.
Reverse phone lookup
Check any US or Canada number to see whether it's a working line, which carrier it sits on, whether it's mobile, landline or VoIP, and roughly where it's registered.
Shows carrier, line type and location. Owner name isn't available here.
Results are for personal, informational use only and may not be used for employment, credit, housing or tenant-screening decisions.
Area code 650: frequently asked questions
Where is the 650 area code located?
The 650 area code is located in California, centered on Daly City. It covers San Mateo, Santa Clara and nearby communities including Daly City, San Mateo, Redwood City, Mountain View, Palo Alto, South San Francisco.
What time zone is 650 in?
Area code 650 is in the Pacific time zone (UTC-8 (PST) / UTC-7 (PDT)). You can see the exact current local time for Daly City on the live clock above.
What cities use area code 650?
Cities and areas that use 650 include Daly City, San Mateo, Redwood City, Mountain View, Palo Alto, South San Francisco. Its primary city is Daly City, CA.
Do I need to dial 1 before 650?
For calls within the US, you do not need to dial a leading 1, but you do need all ten digits: 650 plus the seven-digit number. The 650 area requires ten-digit dialing because more than one area code serves it.
Is 650 a toll-free or scam number?
No — 650 is a normal geographic area code for Daly City, not a toll-free code (toll-free codes are 800, 833, 844, 855, 866, 877 and 888). A 650 number is not inherently a scam, but the code can be spoofed. See the spam-call section above for how to tell.
What are the overlay area codes for 650?
Area code 650 is overlaid by 415, 628, meaning those codes cover the same geographic area.