Area code 408 — San Jose, California

Where is area code 408?

Area code 408 is in San Jose, California, covering San Jose and surrounding communities in California. All 408 numbers are on Pacific Time.

Is area code 408 a scam?

No. Area code 408 is a legitimate area code serving San Jose since 1959. Scammers spoof caller ID to display 408 numbers, which is why complaints exist against a code that is itself genuine.

Neighbour spoofing is the reason a local-looking number is not a guarantee. A caller anywhere in the world can display a 408 number, and the number they display may belong to a real business in San Jose that has nothing to do with the call.

• ·Area code 408 had 405 different numbers reported for spam calls in the 30 days to 28 July 2026.
• ·Area code 408 ranks 174th of 331 US geographic area codes by spam complaint volume.
• ·Of the 424 complaints about area code 408 in the 30 days to 28 July 2026, 62% were reported as a recorded message or robocall.
• ·The most reported subject on area code 408 is calls pretending to be government, businesses, or family and friends, appearing in 14% of its complaints in the 30 days to 28 July 2026.

What these calls were about

Each figure is that subject’s share of every 408 complaint in the 30 days to 28 July 2026, as categorised by the consumer who reported it.

Businesses can prevent their own numbers from being mistaken for calls like these.

Why am I getting text messages from area code 408?

Texts from 408 numbers follow the same pattern as calls — mostly local businesses and services. Treat any text asking for payment or credentials as suspect regardless of the code.

The common patterns are a wrong-number opener that turns into conversation, an unsolicited job offer, and a crypto or investment tip. Do not reply, do not follow the link, and forward the message to 7726 (SPAM) to report it to your carrier.

Area codes that overlay 408

Area code 408 shares its geographic footprint with one other code: 669. Overlays are laid over an existing area rather than splitting it, so all local calls require the full ten-digit number.

Who works in the San Jose area?

Area code 408 has served the Santa Clara Valley since 1959, which means it predates the silicon that made the valley famous. San Jose calls itself the capital of Silicon Valley with some justification: the city passed one million residents at the 2020 census, making it the third largest in California, and its metro area concentrates more engineering talent per square mile than almost anywhere on earth. Semiconductor firms, networking companies, and software giants operate throughout the code, with Cisco, Adobe, eBay, and Zoom headquartered in San Jose itself and Apple next door in Cupertino.

Who lives in the 408 region

The demographics explain the talent pool. About 41.9% of San Jose residents were born outside the country, per 2024 Data USA figures, one of the highest shares of any major American city. Asian residents are the largest group, and Vietnamese, Spanish, and Chinese are the most widely spoken languages after English. San Jose has the largest Vietnamese population of any city outside Vietnam. Median household income reached $146,427 in 2024, among the highest in the nation, set against a median home value of $1.23 million.

What a 408 number signals to a caller

Business communication in the 408 region runs through calendars. Callers describe a culture where unscheduled phone calls are rare, meetings are booked in software, and a call without prior context is usually a wrong number or a robocall. That said, a number in area code 408 still signals valley roots to customers in San Jose, California, and among the region's thousands of small businesses, restaurants, and contractors, the phone remains how work actually gets booked.

Questions