North American Numbers Source-cited · ownership disclosed
Area code
707
In service
United States · since 1959

Santa Rosa / North Bay

Area code 707 serves the North Bay and North Coast of California, including Santa Rosa, Vallejo, Napa, and Eureka. It was created in 1959 and is overlaid by area code 369.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Santa Rosa / North Bay
Type
geographic
Status
in service
In service since
1959
Projected exhaust
2070 Q2

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 707 is

Del Norte, Humboldt, Lake, Mendocino, Napa, Solano, Sonoma, Trinity, and part of Marin Counties..

Communities served wholly or partly by 707:

Santa RosaVallejoNapaPetalumaFairfieldEurekaUkiah

Representative list spanning the North Bay and far North Coast.

B · Relationships

How it relates to other codes

The codes 707 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 · 1959 415 San Francisco Per the fetched Wikipedia article, 707 was split from 415 in a 1959 flash-cut. NOTE: some references cite 916 as the historic parent — see uncertainty note.
Overlay · 2023 369 Santa Rosa / North Bay (overlay) All-services overlay of 707, in service February 1, 2023.
Related 530 Redding Dixon area renumbered from 916 to 707 when 530 was created in 1997.
What's changing. Overlaid by 369 since February 1, 2023; ten-digit dialing required.
C · History

How 707 got here

1959
Area code 707 created via flash-cut split from 415 (northern part, Solano County and north).
Source: Wikipedia
1997
Dixon area renumbered from 916 to 707 when area code 530 was created.
Source: Wikipedia
2023-02-01
Overlay 369 became active for the 707 service area.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
800
Prefixes available
0
Thousands-blocks assigned
4,216

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

Compare 707 with another code →
Sources
Wikipedia ↗
Area codes 707 and 369
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.