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All Area Codes/California
408

Gilroy, California

Area code 408

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

Got a missed call from 408?

Our directory lists 408 for Gilroy, 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 408 number may belong to someone who left California years ago.

Frequently asked questions about 408

Where is area code 408?

Our directory lists area code 408 for Gilroy, 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 408 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 408 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 408 toll-free?

The directory lists 408 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 Rosa415 San Francisco424 Beverly Hills442 Apple Valley510 Alameda530 Chico559 Clovis562 Bellflower619 Chula Vista626 Alhambra627 Santa Rosa628 San Francisco650 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 408?

Area code 408 serves the South Bay portion of the San Francisco Bay Area in Northern California. Gilroy is its primary city, and San Jose is the largest city in its service region. The code covers most of Santa Clara County, including the Santa Clara Valley and communities extending south from San Jose to Gilroy.

Area code 408 also serves portions of Alameda and Santa Cruz counties, though most of its service area is in Santa Clara County. The region lies at the southern end of San Francisco Bay, between the Santa Cruz Mountains to the west and the Diablo Range to the east. These ranges help define the valley’s landscape.

Major landmarks and institutions in the 408 region include Mineta San Jose International Airport, San Jose State University, Santa Clara University, and Lick Observatory on Mount Hamilton. The service area is part of Silicon Valley, a technology and research center that spans several communities. It includes dense urban areas around San Jose and smaller communities in the southern valley, including Gilroy.

Cities and Communities in the 408 Area Code

  • Campbell, Santa Clara County
  • Cupertino, Santa Clara County
  • Gilroy, Santa Clara County
  • Los Gatos, Santa Clara County
  • Milpitas, Santa Clara County
  • Monte Sereno, Santa Clara County
  • Morgan Hill, Santa Clara County
  • San Jose, Santa Clara County
  • Santa Clara, Santa Clara County
  • Saratoga, Santa Clara County
  • Sunnyvale, Santa Clara County

History of Area Code 408

Area code 408 was established in 1959 when the North American Numbering Plan split it from area code 415. The change gave San Jose and the Santa Clara Valley a separate numbering area as telephone service expanded in Northern California.

In 1998, area code 831 split off to serve Monterey, San Benito, and Santa Cruz counties, reducing 408’s original territory. In 2012, area code 669 was added as an overlay for the 408 region. An overlay adds another area code to the same geographic area instead of moving communities to a new one. Existing 408 numbers stayed in service, and local calls require 10-digit dialing.

Key Facts About Area Code 408

  • Area code 408 is a geographic area code in California’s Pacific Time zone.
  • Gilroy is the primary city associated with 408, and San Jose is the largest city in its service area.
  • Most of the 408 service area lies in Santa Clara County, with coverage extending into parts of Alameda and Santa Cruz counties.
  • Santa Clara County had 1,936,259 residents in the 2020 U.S. Census. This county count is not an exact population total for the 408 area.
  • Area code 408 was created in 1959 as a split from area code 415.
  • Area code 831 split from 408 in 1998 to serve Monterey, San Benito, and Santa Cruz counties.
  • Area code 669 has overlaid the 408 region since 2012. Both codes cover the same area, where local calls use 10-digit dialing.
  • San Jose State University in San Jose and Santa Clara University in Santa Clara are within the 408 service area. Lick Observatory is on Mount Hamilton in Santa Clara County.