Skip to content
Country Dialing CodesConnecting a more open world A clearer
more connected world.
US area code · California

Area code 408

Where the 408 area code is, its overlay and how to dial a +1 408 number from anywhere.

CoversCampbell, CaliforniaTime zonePacific (PT)TypeOverlay
Quick answer

The 408 area code is in Campbell, California, United States (Pacific (PT)). To call from abroad: +1 408 555-0123. It is an overlay, so all 10 digits are dialled.

StateCalifornia
Main areaCampbell
Time zonePacific (PT)
TypeOverlay
10-digit dialingRequired
In service since01-Jan-1959

The 408 area code is a geographic North American Numbering Plan (NANP) code covering Campbell, California. It has been in service since 01-Jan-1959 and sits in the Pacific (PT) time zone.

Overlay 408 shares its region

Several area codes cover the same geographic area, so two neighbours can have different codes. Because of the overlay, you must dial all 10 digits (area code + number) even for local calls.

408415669

How to dial a 408 number

From abroad+1 408 555-0123
Within the US / Canada1 408 555-0123
Locally (same area)408 555-0123

Cities in the 408 area code

A 408 number is usually in one of these places in California — 2 counties.

Campbell Santa ClaraGilroy Santa ClaraLos Gatos Santa Clara;Santa CruzMilpitas Santa ClaraMorgan Hill Santa ClaraSan Jose Santa ClaraSanta Clara Santa ClaraSaratoga Santa ClaraSunnyvale Santa Clara

Other California area codes

209213279310323341350357369415424442510530559562

Frequently asked questions

Where is the 408 area code?

The 408 area code is in Campbell, California, United States (Pacific (PT)).

Is 408 an overlay area code?

Yes. 408 overlays the same region as 415, 669, so callers dial all 10 digits.

Do I have to dial 10 digits for 408?

Yes — dial the area code plus the seven-digit number.

How do I call a 408 number from another country?

Dial your exit code (or +), then 1, then 408, then the number: +1 408 555-0123.

Source: NANPA numbering plan. An area code covers a region, not a precise address — a 408 number does not pinpoint a street or ZIP code.

Missed a call from +1 408?

In the 30 days to September 24, 2026, 516 unwanted calls showing a 408 number were reported to the US Federal Trade Commission, 66% of them recorded messages or robocalls. That puts 408 at #190 of 670 area codes reported.

Other218
Reducing your debt (credit cards, mortgage, student loans)88
Dropped call or no message59
Calls pretending to be government, businesses, or family and friends59
Before you call back
  • If you do not know anyone in California, do not call back: a genuine caller will leave a message or send a text.
  • Scammers fake the number shown on caller ID, so a 408 number can hide a caller anywhere in the world.
  • Never give a code received by text or a bank detail to an unknown caller. In the US, calls can be reported at reportfraud.ftc.gov.

Who issues +1 408 numbers

Phone companies hold blocks of numbers in each area code. The main holders in 408:

Pacific Bell 328New Cingular Wireless PCS, LLC 70Cellco Partnership Dba Verizon Wireless 65T-Mobile USA, Inc. 42Mcimetro Access Transmission Services LLC 39Onvoy, LLC 35

About 22.6% of the 800 prefixes in use belong to mobile carriers: a 408 number is often a cell phone, and it may have moved to another carrier since.

Sources: FTC Do Not Call reported calls (numbers as reported by consumers, not verified), NANPA central office code assignments.

All US area codes United States +1 Map of area code 408 — cities & rate centres