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All Area Codes/California
628

San Francisco, California

Area code 628

State
California
Region
Pacific
Time zone
PT
Type
Geographic
--:--local time

Got a missed call from 628?

Our directory lists 628 for San Francisco, California, but an area code alone cannot establish who is calling. Scammers can fake caller ID to match the first six digits of the number they are dialing, a trick called neighbor spoofing, so a familiar-looking code proves nothing about who is really calling.

If you were not expecting the call, let it go to voicemail. Verify the caller through a trusted contact method before returning the call, and never share personal details with an unverified caller.

Worth knowing: an area code no longer tells you where someone is. Mobile numbers keep their original code when people move, so a 628 number may belong to someone who left California years ago.

Frequently asked questions about 628

Where is area code 628?

Our directory lists area code 628 for San Francisco, California. The listed city is a reference location, not a complete coverage map. A phone number's area code does not establish the caller's current location.

What time zone is area code 628 in?

This directory uses Pacific Time (PT) for California. This is state-level guidance; confirm the recipient's local time before calling.

Is area code 628 a scam?

An area code alone cannot tell you whether a call is genuine. Caller ID can be spoofed, including numbers that appear local. Let unexpected calls go to voicemail and verify the caller independently before sharing personal information.

Is area code 628 toll-free?

The directory lists 628 as a geographic area code, not a toll-free code. US toll-free codes include 800, 833, 844, 855, 866, 877, and 888. Your carrier and calling plan determine any charges.

37 listed area codes in California

209 Lodi213 Los Angeles279 Arden-Arcade310 Los Angeles323 Los Angeles341 Oakland369 Santa Rosa408 Gilroy415 San Francisco424 Beverly Hills442 Apple Valley510 Alameda530 Chico559 Clovis562 Bellflower619 Chula Vista626 Alhambra627 Santa Rosa650 Daly City657 Anaheim661 Earlimart669 San Jose707 Benicia714 Anaheim747 Burbank760 Apple Valley805 Camarillo818 Agoura Hills820 Camarillo831 Salinas858 San Diego909 Anaheim916 Elk Grove925 Antioch949 Costa Mesa951 Corona

Nearby in the Pacific

206 Seattle253 Kent360 Bellingham425 Bellevue458 Eugene503 Beaver509 Kennewick541 Bend564 Seattle808 Honolulu

Where Is Area Code 628?

Area code 628 serves the same northern San Francisco Bay Area telephone region as area code 415. It covers San Francisco County, most of Marin County, and a small part of San Mateo County. San Francisco is its primary city, and the region lies in California’s Pacific census region.

In San Francisco, the area includes neighborhoods such as Chinatown, the Mission District, the Richmond District, and the Sunset District. North of the Golden Gate, it reaches Marin County communities such as San Rafael, Novato, Mill Valley, and Sausalito. The service area includes dense city neighborhoods, suburban communities, and coastal settlements.

Landmarks in the region include the Golden Gate Bridge, Alcatraz Island, Golden Gate Park, and Muir Woods National Monument. San Francisco Bay lies at the center of the region, with Pacific coastline west of the city and the Marin Headlands north of the Golden Gate.

Cities and Communities in the 628 Area Code

  • San Francisco, San Francisco County
  • San Rafael, Marin County
  • Novato, Marin County
  • Sausalito, Marin County
  • Mill Valley, Marin County
  • Larkspur, Marin County
  • Corte Madera, Marin County
  • San Anselmo, Marin County
  • Fairfax, Marin County
  • Ross, Marin County
  • Tiburon, Marin County
  • Belvedere, Marin County

History of Area Code 628

Area code 628 entered service on March 21, 2015, as an overlay for area code 415. It added telephone-number capacity to the existing service region without dividing it into separate geographic areas. Existing 415 numbers remained active, and providers could assign new 628 numbers in the same region.

Area code 415 dates to 1947, when it was one of the original area codes in the North American Numbering Plan. The region’s telephone system changed as demand for numbers grew and surrounding areas received new codes. Area code 510 split from 415 in 1991, and area code 650 split from 415 in 1997. The 628 overlay added capacity while allowing existing 415 customers to keep their numbers.

Key Facts About Area Code 628

  • Area code 628 is a geographic area code in California, and San Francisco is its primary city.
  • The 628 and 415 area codes serve the same region, including San Francisco, most of Marin County, and a small part of San Mateo County.
  • Area code 628 is an overlay code, not a geographic split.
  • The 628 overlay entered service on March 21, 2015.
  • Area code 415, which 628 overlays, was among the original North American Numbering Plan codes assigned in 1947.
  • Local calls in the shared 415 and 628 region require 10-digit dialing.
  • The region uses Pacific Time, including Pacific Standard Time and Pacific Daylight Time.
  • Regional institutions include UCSF and the University of San Francisco; landmarks include the Golden Gate Bridge and Alcatraz Island.