Area code 628 — San Francisco, California

Where is area code 628?

Area code 628 is in San Francisco, California, covering San Francisco and surrounding communities in California. All 628 numbers are on Pacific Time.

Is area code 628 a scam?

No. Area code 628 is a legitimate area code serving San Francisco since 2015. Scammers spoof caller ID to display 628 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 628 number, and the number they display may belong to a real business in San Francisco that has nothing to do with the call.

• ·Area code 628 had 188 different numbers reported for spam calls in the 30 days to 28 July 2026.
• ·Area code 628 ranks 268th of 331 US geographic area codes by spam complaint volume.
• ·Of the 201 complaints about area code 628 in the 30 days to 28 July 2026, 35% were reported as a recorded message or robocall.
• ·The most reported subject on area code 628 is calls pretending to be government, businesses, or family and friends, appearing in 34% 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 628 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 628?

Texts from 628 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 628

Area code 628 shares its geographic footprint with one other code: 415. 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 Francisco area?

Area code 628 went into service in 2015 as an overlay on 415, covering San Francisco and Marin County. The underlying economy needs little introduction. San Francisco is a global center for software and finance, home to Salesforce, whose tower dominates the skyline, along with Uber, OpenAI, Anthropic, and a rotating cast of startups working out of SoMa and Mission Bay offices. Wells Fargo and Visa trace their roots here, and the University of California, San Francisco runs one of the country's leading medical research campuses at Mission Bay. The AI hiring wave of the past few years has pulled significant investment back into the city's office market.

Who lives in the 628 region

San Francisco counted 830,235 residents in 2024, with a median household income of $140,970 and a median property value of $1.39 million, per DataUSA. About 33.9% of residents were born outside the United States, and the Asian-American population, at roughly 290,000, is nearly as large as the non-Hispanic white population. Cantonese, Mandarin, and Spanish are all widely spoken. Notably, DataUSA records that most residents worked from home in 2024, a commuting pattern that still shapes when people answer their phones.

What a 628 number signals to a caller

The 415 code carries decades of prestige, so callers describe 628 as the number newcomers get, though the association is weakening as inventory turns over. Ten-digit dialing applies. Business in San Francisco, California is informal in tone and rigorous underneath, and out-of-area callers should expect scheduling over spontaneity: unannounced calls often land in voicemail, and email or text first is generally expected.

Questions