408 Area Code — San Jose, CA
Area code 408 serves San Jose and 4 other cities in California. Local time follows America/Los_Angeles. It overlays with 669, so 10-digit dialling is required.
- State
- California
- Primary city
- San Jose
- Timezone
- America/Los_Angeles
- In service since
- 1959
- Type
- Geographic
- Overlay codes
- 669
Cities Served by 408
The 408 area code covers 5 cities and communities in California.
- San Jose
- Sunnyvale
- Santa Clara
- Cupertino
- Milpitas
About Area Code 408
Area code 408 is a North American Numbering Plan (NANP) area code that has been in service since 1959. It is administered by NANPA on behalf of the FCC and serves the California region anchored on San Jose.
408 now shares its territory with an overlay code (669). 10-digit dialling is required for local calls within this region because the same 7-digit number can be assigned under either code.
Mobile numbers in 408 are portable: a person who moved away from San Jose may still carry a 408 mobile number on their device. If you receive an unexpected call from a 408 number, run it through the reverse lookup tool above for the most accurate, free identification.
If you live or do business in California, you may also interact with neighbouring or overlay codes (669). See the related codes section below to explore the rest of California.
Other California Area Codes
Continue exploring the California numbering plan.
408 Area Code FAQ
Where is area code 408?
Area code 408 is located in California, primarily serving San Jose and surrounding cities including Sunnyvale, Santa Clara, Cupertino. The region operates on PT (America/Los_Angeles) time.
What state is 408 area code?
408 is a California area code. It was put into service in 1959 and shares its geographic footprint with overlay code 669.
Is 408 a scam area code?
408 is a legitimate North American area code allocated by NANPA to California. Like any geographic area code, scammers sometimes spoof 408 numbers — judge each call by content (urgent demands, unfamiliar transfers) rather than the area code alone. Run the specific number through our reverse lookup if you're unsure.
What time zone does 408 use?
Area code 408 operates on PT (America/Los_Angeles). Numbers in this area code follow standard California time-zone rules including any daylight-saving transitions for that region.
Can I look up a specific 408 phone number?
Yes. Use the reverse lookup widget above to enter a full 408 number. NumLocation returns the line type (mobile, landline, VoIP), carrier, rate-center city, and any public listings tied to the number — free.
What's the difference between 408 and 669?
408 and 669 cover the same California geographic area as overlay codes. Calls between them are local, but you must dial all 10 digits. New phone numbers in this region are assigned from either pool depending on what's available with the carrier at signup.