Area Code 209

California

Area code 209 serves California, primarily Stockton, in the Pacific Time (PT) time zone. It has served the region since 01-Jan-1958.

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 350 (Stockton).

In service since: 01-Jan-1958

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 559 (Fresno).

Learn more about overlay and split area codes →

Demographics & Economics

Total Population: 2,163,410
Population Density: 159 people/sq mi
above U.S. average (U.S.: 93 people/sq mi)
Median Household Income: $79,877
near U.S. median (U.S.: $75,144)
Poverty Rate: 13.5%
above U.S. average (U.S.: 11.5%)
Unemployment Rate: 7.9%
above U.S. average (U.S.: 3.6%)
Education Attainment: Bachelor's Degree+
21.5%
below U.S. average (U.S.: 33.7%)
High School or Lower
38.7%

Statistics are population-weighted aggregations from Census ACS 5-year estimates. Population figures are approximate — see Sources & Methodology for details on how area code populations are derived.

See how this area code compares to all US area codes in the Statistics dashboard.

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

Stockton
Modesto
Tracy
Merced
Manteca
Turlock
Lodi
Lincoln
Ceres
Los Banos
Lathrop
Atwater
Galt
Mountain House
Riverbank
Patterson
Oakdale
Ripon
Salida
Livingston
Newman
Winton
Delhi
Garden Acres

and 143 more cities

Area Code 209 geographic coverage map (light mode)

Historical Timeline of Area Code 209

Area code 209 was created on October 26, 1958, when it was split from area code 415, one of three original California area codes alongside 213 and 916. The code has undergone two major restructuring events: a geographic split in 1998 that created area code 559, and a 350 overlay in 2022 that extended the code's reach. Source: Wikipedia

Key milestones:

1958: Area code 209 created from a split of area code 415, serving the central California interior (Source: Wikipedia)
1997: NANPA declared 209 in a jeopardy situation due to prefix exhaustion. The CPUC approved a geographic split in Decision 97-06-051 (Source: NANPA PL-NANP-098)
1998: Area code 209 split on November 14, creating area code 559 for the southern Fresno area. Permissive dialing ended May 15, 1999 (Source: NANPA PL-NANP-098)
2001: CPUC released a utilization study finding 72% of 7.75 million usable numbers were unused, recommending conservation over further splits (Source: CPUC 209 Report)
2021: Area code 209 transitioned to 1+10-digit dialing on October 24, driven by the FCC's 988 Suicide & Crisis Lifeline conflict, a full year before its overlay was activated
2022: The CPUC approved overlay code 350 on May 19, 2022, after 209 was projected to exhaust prefixes by Q4 2022 (Source: CPUC Decision 22-05-018)
2022: Area code 350 went into service November 28 as an all-services overlay, with no permissive dialing period since 10-digit dialing was already in effect (Source: NANPA PL-594)

The 209 region spans eight California counties from the San Joaquin Valley through Gold Country, and its numbering history reflects broader national trends in number conservation and crisis-driven dialing changes.

Regulatory History

Area code 209 has been shaped by several key regulatory actions spanning 25 years. From a 1997 jeopardy declaration to a 2022 overlay, the California Public Utilities Commission and FCC oversaw a progression from number conservation to full overlay implementation. Source: CPUC

Year	Event	Docket	Regulatory Action & Impact
1997	Jeopardy declaration	PL-NANP-054	NANPA declared 209 in jeopardy status. CPUC approved geographic split in Decision 97-06-051 to create area code 559 (Source: NANPA)
1998	Geographic split executed	Decision 97-06-051	209 split on November 14, creating 559 for the southern Fresno region. Permissive dialing period ran through May 15, 1999 (Source: NANPA)
2001	Utilization study	CPUC Report 19540	CPUC found 72% of 7.75 million numbers unused, 3.05 million held in carrier inventories. Recommended conservation over splits/overlays (Source: CPUC)
2020	988 designation	FCC 20-100	FCC designated 988 as the National Suicide Prevention Lifeline 3-digit code. 209 was one of 9 California area codes with 988 prefixes, requiring 10-digit dialing (Source: CPUC)
2021	10-digit dialing transition	PL-556	209 transitioned to 1+10-digit dialing on October 24, 2021, a full year before the overlay was activated (Source: Wikipedia)
2022	350 overlay approved	Decision 22-05-018	CPUC approved 350 overlay on May 19, 2022. Only 35 prefixes (4%) remained. Overlay went into service November 28, 2022 (Source: CPUC)

County Coverage

Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 209).

County	Population	Share
San Joaquin, CA	853,539	39.5%
Stanislaus, CA	581,947	26.9%
Merced, CA	358,318	16.6%
Tuolumne, CA	62,913	2.9%
Alameda, CA	61,375	2.8%
Calaveras, CA	50,894	2.4%
Sacramento, CA	46,995	2.2%
Amador, CA	41,024	1.9%
Contra Costa, CA	31,200	1.4%
Mariposa, CA	23,283	1.1%
Fresno, CA	19,856	0.9%
Madera, CA	19,856	0.9%
El Dorado, CA	9,276	0.4%
Alpine, CA	2,934	0.1%

Area Code 209 Family Tree

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Total Codes

Splits

Overlays

Max Depth

All Descendants

Code ▲	State	Type	In Service	Parent
350	CA	overlay	28-Nov-2022	209
357	CA	overlay	26-Mar-2025	559
559	CA	split	14-Nov-1998	209

Area code 209 was originally assigned in 01-Jan-1958 to serve CA. Over the years, it has generated 3 descendant area codes through a combination of geographic splits and overlays as demand for telephone numbers grew.