Area Code 369
California
Area code 369 serves California, primarily Santa Rosa, in the Pacific Time (PT) time zone. It is an overlay area code sharing territory with area code 707.
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 707 (Santa Rosa).
In service since: 01-Feb-2023
Historical Timeline of Area Code 369
Area code 369 was originally approved as a geographic split of area code 707 in 1999, but the split was cancelled in 2000 when thousand-block number pooling conservation measures succeeded. Twenty-three years later, 369 was revived and implemented as an all-services overlay on February 1, 2023, after the 707 NPA was declared in jeopardy with only 29 usable prefixes remaining out of 754 total. (Source: CPUC Decision 22-06-031)
Key milestones in the 707/369 story:
- 1959: Area code 707 created by split from 415, covering Solano County and north as California's 8th area code. (Source: NANPA PL-599)
- 1999: CPUC Decision D.99-12-049 approved a three-way split of 707 that would have created codes 369 and 627. This was the first time 369 was designated as an area code. (Source: CPUC Decision 22-06-031)
- 2000: CPUC Decision D.00-07-053 (July 20) cancelled the 369/627 split due to success of thousand-block number pooling conservation measures.
- 2007: CPUC Decision D.07-05-011 dismissed all pending 707 relief requests; NANPA rescinded jeopardy.
- 2021: NANPA Planning Letter PL-556 mandated 1+10-digit local dialing in 707 NPA effective July 15, 2022, due to the FCC's 988 National Suicide Prevention Hotline implementation. (Source: NANPA PL-599)
- 2022: January 4: NANPA declared a "jeopardy situation" for the 707 NPA with only 29 usable prefixes remaining out of 754 total. June 23: CPUC issued Decision 22-06-031 approving all-services distributed overlay, selecting 369 as the new code. August 1: NANPA Planning Letter PL-599 issued, setting the implementation schedule. (Source: CPUC Decision 22-06-031)
- 2023: February 1: Area code 369 put in service as overlay to 707 NPA. New customers may receive 369 numbers. May 4: First 369 prefix activated, 369-200 assigned to Dixon, California. (Source: NANPA PL-599)
The 23-year gap between the original split approval in 1999 and the overlay implementation in 2023 reflects the success of number conservation measures in the late 1990s and early 2000s, which extended the life of the 707 NPA by over two decades.
Unique Facts About Area Code 369
Several milestones in the region's telecom history are tied to area code 369. (Source: CPUC Decision 22-06-031)
- Cancelled split revived 23 years later: Area code 369 was first approved as a geographic split in 1999 (CPUC Decision D.99-12-049), cancelled in 2000 when number conservation measures succeeded (Decision D.00-07-053), and finally implemented as an overlay in 2023. This 23-year gap between initial approval and actual implementation spans one of the longest delays in NANP history. (Source: CPUC Decision 22-06-031)
- NANPA test number 369-369-1369: NANPA designated 369-369-1369 as the official test number to verify routing to the 369 NPA, per Planning Letter PL-599. (Source: NANPA PL-599)
- No paid advertising required for overlay: The CPUC eliminated the standard paid advertising requirement from the Public Education Program because mandatory 1+10-digit dialing education was already underway due to the federal 988 Suicide and Crisis Lifeline transition. This was a regulatory efficiency unique to overlays implemented after the 988 mandate. (Source: CPUC Decision 22-06-031)
- Jeopardy declared with only 29 prefixes remaining: When NANPA declared the 707 NPA in jeopardy on January 4, 2022, only 29 usable prefixes remained out of 754 total. This scarcity triggered the overlay relief process that ultimately created area code 369. (Source: CPUC Decision 22-06-031)
- First prefix activated in Dixon: The first prefix in the 369 NPA was 369-200, assigned to Dixon, California on May 4, 2023. Dixon is a small city in Solano County, notable as the first community to receive a 369 number.
- 11 counties across northwestern California: The 707/369 overlay complex serves all or portions of 11 counties: Del Norte, Glenn, Humboldt, Lake, Marin, Mendocino, Napa, Solano, Sonoma, Tehama, and Trinity, spanning from the Oregon border to the northern San Francisco Bay Area. (Source: CPUC 707 Area Code Page)
FCC Regulatory History
The 707/369 area code overlay was shaped by four major CPUC regulatory decisions spanning 23 years, from the original split approval in 1999 through its cancellation, a period of stability, and the final overlay approval in 2022. NANPA Planning Letters PL-556 and PL-599 governed the implementation timeline. (Source: CPUC Decision 22-06-031)
| Year | Event | Docket | Regulatory Action & Impact |
|---|---|---|---|
| 1999 | Three-Way Split Approved | D.99-12-049 | CPUC approved a three-way split of 707 that would have created codes 369 and 627. This was the first time 369 was designated as an area code. (Source: CPUC) |
| 2000 | Split Cancelled | D.00-07-053 | CPUC cancelled the 369/627 split implementation on July 20, 2000, after thousand-block number pooling conservation measures proved sufficient to extend the life of the 707 NPA. |
| 2007 | Relief Requests Dismissed | D.07-05-011 | CPUC dismissed all pending 707 NPA relief requests. NANPA rescinded the jeopardy declaration, stabilizing the 707 NPA for another 15 years. |
| 2021 | 988 Dialing Mandate | NANPA PL-556 | NANPA mandated 1+10-digit local dialing in the 707 NPA effective July 15, 2022, required by the FCC's 988 Suicide and Crisis Lifeline transition. (Source: NANPA PL-599) |
| 2022 | Overlay Approved | D.22-06-031 | CPUC approved all-services distributed overlay for 707 NPA, selecting 369 as the new code. Only 29 usable prefixes remained out of 754 total. Jeopardy declared January 4, 2022. Implementation required within 6 months. (Source: CPUC Decision 22-06-031) |
| 2022 | Implementation Schedule Set | NANPA PL-599 | NANPA issued Planning Letter PL-599 setting the implementation schedule: customer education August 2022 through February 2023; in-service date February 1, 2023; test number 369-369-1369. (Source: NANPA PL-599) |
| 2023 | 369 Goes In Service | Area code 369 put in service on February 1, 2023 as overlay to 707 NPA. New customers may receive 369 numbers. First prefix activated: 369-200 (Dixon, May 4, 2023). (Source: CPUC Press Release) |
Demographics & Economics
- Total Population
- 1,606,858
- Population Density
- 114 people/sq miabove U.S. average (U.S.: 94 people/sq mi)
- Median Household Income
- $99,994above U.S. median (U.S.: $78,538)
- Poverty Rate
- 10.7%below U.S. average (U.S.: 12.4%)
- Unemployment Rate
- 6.3%above U.S. average (U.S.: 5.2%)
- Education Attainment
- Bachelor's Degree+33.2%near U.S. average (U.S.: 35.0%)High School or Lower27.5%
Statistics are population-weighted aggregations from Census ACS 5-year estimates.See Sources for details.
Geographic Coverage
State
CA
Major Cities
- Santa Rosa
- Vallejo
- Fairfield
- Vacaville
- Napa
- Petaluma
- Rohnert Park
- Benicia
- Eureka
- Windsor
- American Canyon
- Dixon
- Arcata
- McKinleyville
- Clearlake
- Ukiah
- Fortuna
- Healdsburg
- Sonoma
- Rio Vista
- Cloverdale
- Larkfield-Wikiup
- University of California-Davis
- Cotati
and 123 more cities
Time Zone
- Pacific Time (PT)
Current Time
County Coverage
Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 369).
| County | Population | Share |
|---|---|---|
| Sonoma, CA | 501,019 | 31.2% |
| Solano, CA | 471,260 | 29.3% |
| Napa, CA | 230,024 | 14.3% |
| Humboldt, CA | 132,015 | 8.2% |
| Mendocino, CA | 106,209 | 6.6% |
| Lake, CA | 69,642 | 4.3% |
| Marin, CA | 33,878 | 2.1% |
| Del Norte, CA | 27,240 | 1.7% |
| Yolo, CA | 22,971 | 1.4% |
| Sacramento, CA | 10,973 | 0.7% |
| Trinity, CA | 1,627 | 0.1% |
Call Context
This area code covers a metropolitan region in CA with moderate to high population density, centered on Santa Rosa and surrounding communities.
Nearby Area Codes
Area codes geographically closest to 369.
Other Area Codes in California
Area codes that also serve California, linked for easy comparison.
Frequently Asked Questions
Common questions about area code 369 and how phone numbering works.
CPUC D.99-12-049 approved 369 as a geographic split code in 1999, later cancelled. 23 years later, it was implemented as an overlay instead.
369 is a multiple of 3 and 123 (3×123 = 369), making it one of the few 'palindromic' area codes (reads same forwards and backwards).
Phone numbers assigned to area code 369 are tied to where they were originally provisioned — not the caller's current location. This code serving roughly 1607k people covers Santa Rosa in CA, so a number originally set up there will retain the 369 prefix even if the owner moves or uses VoIP. Mobile phones keep their original number when users relocate, and businesses often adopt local area codes to establish a regional presence.
Start by looking up the area code on this site to understand its geographic context — area code 369 is associated with Santa Rosa in CA. For caller-specific details, use your carrier's caller ID features or check public directories. If you suspect fraud, you can report it to the FTC. To file a complaint about robocalls or spoofed numbers, visit the FCC Consumer Complaint Center. You can also register with the National Do Not Call Registry.
When an area's available number pool runs low, regulators introduce an "overlay" code covering the same territory. Both codes coexist, and new numbers are assigned from whichever has availability. Area code 369 serves the Santa Rosa region in CA, where growing demand for phone numbers necessitated an additional code. This area code shares its region with area code 707. Learn more in our overlay vs split guide.