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408 Area Code

Area code 408 serves San Jose, Salinas, Sunnyvale, Santa Clara, Milpitas and nearby communities in California. It has been in service since January 1, 1959, when it was split from 415.

StateCalifornia
Time zonePacific
Local time now…
Prefixes in use786
Overlay with669
Projected to run out2056
San JoseSalinasSunnyvaleSanta ClaraMilpitasGilroyCupertinoMorgan HillCampbellLos GatosSaratogaAlum RockEast FoothillsSan MartinSan JoseSalinasSunnyvaleGilroyMorgan Hill
Cities and towns served by area code 408

Who issues 408 numbers

Mobile 23%VoIP and cable 23%Landline 54%

Share of the 786 prefixes (the three digits after 408) assigned to each type of carrier. Classification by carrier name, approximate.

CarrierPrefixes
AT&T (Pacific Bell)331
AT&T Mobility70
Verizon Wireless65
Verizon Business (MCImetro)48
T-Mobile42
Lumen (Level 3)40
Onvoy (Sinch)35
Spok27

Cities and towns in area code 408

CityPopulationOther area codes
San Jose989,814669
Salinas159,134831
Sunnyvale156,577669
Santa Clara133,446669
Milpitas78,596669
Gilroy60,764669
Cupertino58,333669
Morgan Hill45,625669
Campbell42,490669
Los Gatos32,576669
Saratoga30,418669
Alum Rock11,619669
East Foothills8,630669
San Martin7,199669

Got a call from 408?

A 408 number was originally issued in California, but that does not prove the caller is there. 23% of 408 prefixes belong to VoIP and cable providers, whose numbers can be bought online and used from anywhere. Caller ID can also be spoofed, so treat urgent requests for money, codes or passwords from any area code with suspicion, and call back on a number you already know.

All 786 prefixes in area code 408

Format: (408) XXX-YYYY. Carrier is the company the block was originally assigned to; numbers may since have been ported to another carrier.

Questions about area code 408

Where is area code 408?
Area code 408 is in California. It covers San Jose, Salinas, Sunnyvale, Santa Clara, Milpitas, Gilroy and 8 more cities and towns.
What time zone is area code 408?
Area code 408 is in the Pacific time zone.
Is 408 a toll-free number?
No. 408 is a geographic area code in California. Toll-free numbers in the US start with 800, 833, 844, 855, 866, 877 or 888.
Why does 408 share its area with 669?
408 and 669 form an overlay: they cover the same territory, so new numbers there can get any of these codes, and local calls need all 10 digits.
Will area code 408 run out of numbers?
NANPA's latest forecast projects the 408/669 overlay to exhaust in the first quarter of 2056. Before that happens, a new area code is usually added as an overlay; existing numbers keep their code.

Other area codes in California