Editing Area codes 805 and 820 (section)

==History==
Area code 805 was created in 1957, when one of the [[original North American area codes]] in California, 213, was reduced in size to provide more central office codes in the Los Angeles area.
 
In 1998, the California-Nevada Code Administration (CNCA) determined that California was under "substantial number growth" which required exhaustion mitigation in the 805 numbering plan area,<ref>{{Cite web
|url=https://www.nationalnanpa.com/pdf/pl-nanp-111.pdf
|title=Planning Letter PL-111: NANP-Split of 805 (California) Numbering Plan Area (NPA)
|publisher=NANPA
|date=1988-02-12
|access-date=2023-02-27
}}</ref> by splitting the eastern part of the NPA into a new plan area with the [[area code 661]]. The split was effective on February 13, 1999, for the [[San Joaquin Valley]], [[Santa Clarita Valley]], and [[Antelope Valley]].

In August 2016, the [[California Public Utilities Commission]] held a series of hearings for the decision of providing a relief area code in NPA 805 in the form of an [[Overlay plan|overlay]] or an [[area code split]].<ref>{{Cite web|url=http://www.cpuc.ca.gov/805areacode/|title=805 Area Code|website=California PUC|language=en|access-date=2017-04-02}}</ref> On May 25, 2017, the Commission approved 820 as an overlay area code.<ref>{{Cite web
|url=http://docs.cpuc.ca.gov/SearchRes.aspx?docformat=ALL&docid=187354351
|title=DECISION GRANTING REQUEST FOR AN ALL-SERVICE AREA CODE OVERLAY IN THE 805 NUMBERING PLAN AREA
|date=2017-05-25|website=cpuc.ca.gov|access-date=2017-05-25
}}</ref><ref>{{Cite web
|url=https://www.nationalnanpa.com/pdf/PL_509.pdf
|title=Planning Letter PL-509: NPA 805 and 820 All-Services Overlay (California) 
|publisher=NANPA
|date=2017-06-19
|access-date=2023-02-27
}}</ref> New telephone numbers of 820 area code began service in June 2018, requiring [[ten-digit dialing]] for all calls.<ref>{{cite web|url=https://www.vcstar.com/story/news/local/2018/05/28/new-area-code-changes-how-805-dial-ventura-county-san-luis-obispo/624048002/|title=New area code changes the way people dial in the 805 as of Saturday|newspaper=[[Ventura County Star]]|first=Tom |last=Kisken|date=2018-05-28|access-date=2018-05-29}}</ref>

In addition to the municipalities below, area code 805 also serves the US military facilities in [[Kwajalein Atoll|Kwajalein]], [[Marshall Islands|Republic of the Marshall Islands]] with a [[Paso Robles, California|Paso Robles]] [[Telephone prefix|prefix]] (805-355). This arrangement originated from the [[United States Army|US Army's]] first satellite communications station having been built at nearby [[Camp Roberts, California|Camp Roberts]].