San Jose (overlay)

Area code 669 is an all-services overlay of area code 408, serving the same South Bay territory. It was the first overlay in the San Francisco Bay Area, in service in 2012.

The essentials Numbering data · NumberResearch · as of 2026-09-18

Place

San Jose (overlay)

Type

geographic

Status

in service

In service since

2012

Projected exhaust

2056 Q1

Status, dates and counts are read from NumberResearch (NANPA / CNAC / FCC records). Assignment records show initial assignees, not the carrier serving a number today.

A · Where it is

Where 669 is

Same as 408: most of Santa Clara County and northern Santa Cruz County..

Communities served wholly or partly by 669:

San JoseSunnyvaleSanta ClaraCupertinoMilpitasLos GatosGilroy

Shares the 408 service area.

B · Relationships

How it relates to other codes

The codes 669 was split from, spawned, or shares its area with. A split divides the map and changes some numbers; an overlay shares the same ground and changes none — what's the difference?

Overlay · 2012 408 San Jose All-services overlay of the 408 numbering plan area; first overlay in the Bay Area.

What's changing. Active overlay of 408; ten-digit dialing required.

C · History

How 669 got here

2012-11-20

Area code 669 official in-service date; permissive dialing ran April 21 to October 20, 2012.

Source: Wikipedia

D · Capacity

How full it is

Prefixes assigned

252

Prefixes available

548

Thousands-blocks assigned

2,298

Prefix-assignment counts describe allocation to carriers, not how many individual numbers are in use. Full technical records: NumberResearch ↗.

Compare 669 with another code →

Sources

Wikipedia ↗

Area codes 408 and 669

NumberResearch.org ↗

Live status, dates, assignment counts and exhaust forecast — data as of 2026-09-18 (CC BY 4.0).

Place, relationships and history above are compiled by North American Numbers from the sources listed and last checked 2026-09-18. A check date is not an expert review — see how this is made. Flag an error.