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.

Overlay Area Code

This area code is part of an overlay region, meaning the same geographic area is served by multiple area codes. Overlay codes were introduced to meet growing demand for phone numbers without requiring existing customers to change their numbers.

This area code shares its geographic region with: area code 840 (San Bernardino).

In service since: 14-Nov-1992

Learn more about overlay and split area codes →

Area Code Splits

Parts of this area code’s original geographic region were later assigned new area codes through splits. When a split occurs, some customers in the original area code region are assigned the new area code.

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

View All Trees

Hover over nodes to see details. Click to navigate to individual area code pages. Use scroll to zoom, drag to pan.

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.