North American Numbers Source-cited · ownership disclosed
Area code
909
In service
United States · since 1992

Inland Empire (San Bernardino)

Area code 909 was split from 714 in 1992 to serve the Inland Empire, and now covers far-eastern Los Angeles County, southwestern San Bernardino County and small parts of Riverside County. Since 2021 it has shared its territory with overlay code 840.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Inland Empire (San Bernardino)
Type
geographic
Status
in service
In service since
1992
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 909 is

Far-eastern Los Angeles County, southwestern San Bernardino County, and small portions of Riverside County (Inland Empire), California..

Communities served wholly or partly by 909:

San BernardinoOntarioRancho CucamongaFontanaPomonaChinoUplandRedlands

Representative, not exhaustive.

B · Relationships

How it relates to other codes

The codes 909 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?

Split from · 1992 714 Northern Orange County Split from 714 on November 14, 1992.
Spawned · 2004 951 Riverside Western Riverside County split off as 951 on July 17, 2004.
Overlay · 2021 840 Inland Empire (overlay) All-services overlay on 909, effective February 23, 2021.
What's changing. Overlay complex with 840 since 2021; ten-digit dialing required for all calls.
C · History

How 909 got here

1992-11-14
Area code 909 created by split from 714.
Source: Wikipedia
2004-07-17
Western Riverside County split off as area code 951.
Source: Wikipedia
2021-02-23
Area code 840 overlay activated for the 909 territory.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
800
Prefixes available
0
Thousands-blocks assigned
4,645

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

Compare 909 with another code →
Sources
Wikipedia ↗
Area codes 909 and 840
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.