Area codes 707 and 369 are telephone

area code A telephone numbering plan is a type of numbering scheme used in telecommunication to assign telephone numbers to subscriber telephones or other telephony endpoints. Telephone numbers are the addresses of participants in a telephone network, rea ...

s in the

North American Numbering Plan The North American Numbering Plan (NANP) is an integrated telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1, World Numbering Zone ...

(NANP) for the northwestern part of the U.S. state of

California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...

. The area codes serve part of the northern

San Francisco Bay Area The San Francisco Bay Area, commonly known as the Bay Area, is a List of regions of California, region of California surrounding and including San Francisco Bay, and anchored by the cities of Oakland, San Francisco, and San Jose, California, S ...

, as well as the North Coast. Major cities in the area codes include Napa, Sebastopol, Vallejo, Benicia, Fairfield, Santa Rosa, Windsor, Healdsburg, Rohnert Park, Petaluma,

Fort Bragg Fort Bragg (formerly Fort Liberty from 2023–2025) is a United States Army, U.S. Army Military base, military installation located in North Carolina. It ranks among the largest military bases in the world by population, with more than 52,000 m ...

, Rio Vista, Crescent City, Eureka, Clearlake, Vacaville, Dixon, and Ukiah. 707 was created by a split of area code 415 on March 1, 1959. Area code 369 was added to the numbering plan area (NPA) on February 1, 2023, to form an overlay numbering plan in the service area.

History

When the American Telephone and Telegraph Company (AT&T) devised the first comprehensive telephone numbering plan for the North American continent in 1947, the far northern part of California received area code 916, with the exclusion of the city of Sacramento, which used area code 415. California area codes were reorganized geographically in 1950, so that 916 was assigned to a numbering plan area that comprised only the northeastern part from the Sierra Nevada to the Central Valley. The coastal area to the west was assigned area code 415. With this change, Sacramento was also changed to area code 916. On March 1, 1959, numbering plan area 415 was divided in a flash-cut (without permissive dialing period) in which the northern part of the numbering plan area (Solano County and north thereof) received area code 707, which was California's eighth area code (along with 213, 415, 916, 714, 408, 805, and 209), and the last new area code in the state until 619 was added in 1982. When area code 530 was split from area code 916 on November 1, 1997, the Dixon area was renumbered from area code 916 to 707 and switched from the Sacramento local access and transport area (LATA) into the San Francisco LATA. 707 was the last of California's thirteen area codes with only ''0'' or ''1'' in middle position, the others being 310, 510, 818 and 909, all of which, in addition to 619, were introduced decades after 707's debut) to require relief from a "new format" area code (those with 2–8 as their middle digit, which were introduced beginning in 1995 when the NANP ran out of the original format NPAs), despite explosive growth in the area, particularly its southern portion, as well as the proliferation of cell phones and pagers. In 1999, a three-way, two-phase split of area code 707 was scheduled by Pacific Bell such that a new area code (627) would have served most of Napa and Sonoma counties and small portions of Marin and Mendocino counties, while another new area code (369) would have served Solano County as well as a small portion of Napa County, beginning in December 2000 and October 2001, respectively. However, due to the success of

number pooling Telephone number pooling, thousands-block number pooling, or just number pooling, is a method of allocating telephony numbering space of the North American Numbering Plan in the United States. The method allocates telephone numbers in blocks of 1,0 ...

in preserving numbering resources, the California Public Utilities Commission cancelled these actions on July 27, 2000. Still, after twenty more years of continued growth in the region, it was determined that 707 would indeed require relief. On August 1, 2022, the NANP Administrator set the effective implementation date of the overlay of 707 by the new 369 NPA to February 1, 2023. Prior to October 2021, area code 707 had telephone numbers assigned for the central office code 988. In 2020, ''988'' was designated nationwide as a dialing code for the National Suicide Prevention Lifeline, which created a conflict for exchanges that permit seven-digit dialing. This area code was therefore scheduled to transition to ten-digit dialing by October 24, 2021.

Service area

Del Norte County

* Bertsch-Oceanview * Crescent City * Crescent City North *Fort Dick * Gasquet * Hiouchi * Klamath *Northcrest * Pelican Bay State Prison * Smith River

Humboldt County

* Alderpoint * Alton * Arcata * Bayside * Bayview * Blocksburg * Blue Lake * Bridgeville * Carlotta * Cutten * Eureka * Fernbridge * Ferndale * Fieldbrook * Fields Landing * Fortuna * Garberville * Honeydew * Humboldt Hill * Hydesville * Loleta * Kneeland * Korbel *

Manila Manila, officially the City of Manila, is the Capital of the Philippines, capital and second-most populous city of the Philippines after Quezon City, with a population of 1,846,513 people in 2020. Located on the eastern shore of Manila Bay on ...

* McKinleyville * Miranda * Myers Flat * Myrtletown * Orick * Pepperwood * Petrolia * Phillipsville * Pine Hills * Redcrest * Redway * Rio Dell *

Samoa Samoa, officially the Independent State of Samoa and known until 1997 as Western Samoa, is an island country in Polynesia, part of Oceania, in the South Pacific Ocean. It consists of two main islands (Savai'i and Upolu), two smaller, inhabited ...

* Scotia * Shelter Cove *

Trinidad Trinidad is the larger, more populous island of the Republic of Trinidad and Tobago, the country. The island lies off the northeastern coast of Venezuela and sits on the continental shelf of South America. It is the southernmost island in ...

* Weott * Westhaven-Moonstone * Willow Creek * Whitethorn

Lake County

* Clearlake * Clearlake Oaks * Clearlake Park *Clearlake Rivieras * Cobb * Finley * Glenhaven * Hidden Valley Lake * Kelseyville * Lake Pillsbury * Lakeport *

Loch Lomond Loch Lomond (; ) is a freshwater Scottish loch which crosses the Highland Boundary Fault (HBF), often considered the boundary between the lowlands of Central Scotland and the Highlands.Tom Weir. ''The Scottish Lochs''. pp. 33-43. Published by ...

* Lower Lake *

Lucerne Lucerne ( ) or Luzern ()Other languages: ; ; ; . is a city in central Switzerland, in the Languages of Switzerland, German-speaking portion of the country. Lucerne is the capital of the canton of Lucerne and part of the Lucerne (district), di ...

* Middletown * Nice * North Lakeport * Sulphur Bank Rancheria * Upper Lake * Whispering Pines * Witter Springs

Marin County

* Dillon Beach * Fallon * Tomales

Mendocino County

* Albion * Boonville * Branscomb * Calpella *

Caspar Caspar is a masculine given name. It may refer to: People * Caspar (magus), a name traditionally given to one of the Three Magi in the Bible who brought the baby Jesus gifts *Caspar Austa (born 1982), Estonian cyclist *Caspar Badrutt (1848–1904) ...

* Cleone * Comptche * Covelo * Dos Rios * Elk *

* Gualala * Hopland *Inglenook *Keene Summit * Laytonville * Leggett * Little River *

Manchester Manchester () is a city and the metropolitan borough of Greater Manchester, England. It had an estimated population of in . Greater Manchester is the third-most populous metropolitan area in the United Kingdom, with a population of 2.92&nbs ...

* Mendocino * Navarro * Noyo *

Philo Philo of Alexandria (; ; ; ), also called , was a Hellenistic Jewish philosopher who lived in Alexandria, in the Roman province of Egypt. The only event in Philo's life that can be decisively dated is his representation of the Alexandrian J ...

*Piercy * Point Arena * Potter Valley *Pudding Creek *Redwood Lodge * Redwood Valley * Rockport *Sherwood Valley Rancheria * Talmage * Ukiah *Westport * Willits *Yorkville