Area Code 909

California

Area code 909 serves California, primarily San Bernardino, in the Pacific Time (PT) time zone. It has served the region since 14-Nov-1992.

Published: February 17, 2026Verified against NANPA and FCC records

Overlay Area Code

This area code shares its geographic footprint with an overlay code, so the same cities are served by two area codes. Because overlays leave existing numbers untouched, this region's relief planning favors adding codes over redrawing boundaries.

The codes serving this same region: area code 840 (San Bernardino).

With prefix utilization already at 98.3%, numbering resources here are under sustained pressure — context that explains why overlays were introduced.

In service since: 14-Nov-1992

Learn more about overlay and split area codes →

Area Code Splits

One area code has been carved out of this code's original territory through a geographic split. Each split was a relief action: as demand grew, part of the region was reassigned to a new code rather than overlaying the whole territory.

Split into: area code 951 (Riverside).

Learn more about overlay and split area codes →

Demographics & Economics

Demographic Data Unavailable for Area Code 909

County-level demographic data is not available for this area code because NPA boundary polygons are not publicly distributed by NANPA. We use geographic boundary data from the Colorado Open Data Portal to map area codes to counties, which currently covers 194 of 376 geographic area codes.

Demographic statistics (population, income, education, poverty) require county-level aggregations from Census ACS data. Without a county mapping, these aggregations cannot be computed. We are actively seeking additional data sources to improve coverage.

Statistics are population-weighted aggregations from Census ACS 5-year estimates where county boundary data is available.See Sources for details.

Time Zone

Pacific Time (PT)

NANPA Relief Status

According to the latest NANPA analysis (July 2026), this area code is not currently listed as exhausting within the next 36 months. No relief planning is in progress for this NPA.

Source: NANPA NPA Relief Planning Reports · See all relief planning statuses

Current Time

Pacific Time (PT)

Prefix Utilization

Geographic Coverage

State

Major Cities

San Bernardino
Fontana
Ontario
Rancho Cucamonga
Pomona
Rialto
Chino
Upland
Chino Hills
Redlands
Eastvale
Highland
Yucaipa
Colton
Diamond Bar
Rowland Heights
Montclair
Claremont
San Dimas
La Verne
Walnut
Loma Linda
Bloomington
Grand Terrace

and 13 more cities

Area Code 909 geographic coverage map (light mode)

Demographics

Detailed demographic and economic data is not yet available for area code 909.

History

Area code 909 was established in 1992 as a geographic area code. Over time, area code area code 951 was split from 909. It shares its territory with area code area code 840.

County Coverage

Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 909).

County	Population	Share
San Bernardino, CA	1,780,113	73.1%
Los Angeles, CA	422,826	17.4%
Riverside, CA	233,027	9.6%

Area Code 909 Family Tree

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Total Codes

Splits

Overlays

Max Depth

All Descendants

Code ▲	State	Type	In Service	Parent
840	CA	overlay	23-Feb-2021	909
951	CA	split	17-Jul-2004	909

Area code 909 was originally assigned in 14-Nov-1992 to serve CA. Over the years, it has generated 2 descendant area codes through a combination of geographic splits and overlays as demand for telephone numbers grew.