Area code 925: Difference between revisions

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Area code 925 is a telephone area code in the North American Numbering Plan for a northern part of the U.S. state of California. It was created in an area code split of area code 510 in 1998. The numbering plan area comprises the inland portions of the East Bay counties of Alameda and Contra Costa.

History

The numbering plan area (NPA) was originally served with area code 415, one of the first three area codes of California in 1947, which originally was assigned to central California. In 1991, area code 510 was created to serve most of the East Bay. Area code 925 was created March 14, 1998, when area code 510 was split along the natural border of the Berkeley Hills.

The numbering plan area includes southeastern Alameda County (Dublin, Pleasanton, Livermore, Sunol, and unincorporated areas surrounding those communities), and all of Contra Costa County except the western part (El Cerrito to Crockett).

Prior to October 2021, area code 925 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. The area code was therefore transitioned to ten-digit dialing on October 24, 2021.^[1]

Service area

Alameda County

Contra Costa County

References

^ "Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Hotline)" (PDF). North American Numbering Plan Administrator. January 8, 2021. Retrieved March 9, 2021.

External links

NANPA area code map of California
Report on the 925 area code produced by the California Public Utilities Commission, Telecommunications Division

California area codes: 209/350, 213/323, 310/424, 408/669, 415/628, 510/341, 530, 559, 562, 619/858, 626, 650, 661, 707/369, 714/657, 760/442, 805/820, 818/747, 831, 909/840, 916/279, 925, 949, 951
	North: 707/369, 916/279
West: 510/341	925	East: 209/350
	South: 408/669

37°54′N 122°00′W / 37.9°N 122°W / 37.9; -122

[pl556-1] "Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Hotline)" (PDF). North American Numbering Plan Administrator. January 8, 2021. Retrieved March 9, 2021.

[1]

@@ Line 1: / Line 1: @@
 {{short description|Area code in California, United States}}
 {{California area codes image map|925}}
-'''Area code 925''' is a [[California]] [[telephone]] [[area code]] that was split from [[area code 510]] on March 14, 1998. It covers the inland portions of the East Bay counties of [[Alameda County, California|Alameda]] and [[Contra Costa County, California|Contra Costa]] in the northern area of [[California]].
+'''Area code 925''' is a telephone [[area code]] in the [[North American Numbering Plan]] for a northern part of the [[U.S. state]] of [[California]]. It was created in an [[area code split]] of [[area code 510]] in 1998. The numbering plan area comprises the inland portions of the East Bay counties of [[Alameda County, California|Alameda]] and [[Contra Costa County, California|Contra Costa]].
+==History==
-The area was originally part of [[area code 415]], one of the first three area codes created in California in 1947, which originally covered all of central California. In 1991, [[area code 510]] was created to encompass most of the [[East Bay (San Francisco Bay Area)|East Bay]].  Area code 925 was created March 14, 1998, when area code 510 was split along the natural border of the [[Berkeley Hills]].
+The numbering plan area (NPA) was originally served with [[area code 415]], one of the first three area codes of California in 1947, which originally was assigned to central California. In 1991, [[area code 510]] was created to serve most of the [[East Bay (San Francisco Bay Area)|East Bay]].  Area code 925 was created March 14, 1998, when area code 510 was split along the natural border of the [[Berkeley Hills]].
-The area code includes southeastern Alameda County (Dublin, Pleasanton, Livermore, Sunol, and unincorporated areas surrounding those communities), and all of Contra Costa County except the western part (El Cerrito to Crockett).
+The numbering plan area includes southeastern Alameda County (Dublin, Pleasanton, Livermore, Sunol, and unincorporated areas surrounding those communities), and all of Contra Costa County except the western part (El Cerrito to Crockett).
+Prior to October 2021, area code 925 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]]. The area code was therefore transitioned to [[ten-digit dialing]] on October 24, 2021.<ref name="pl556">{{cite web|url=https://nationalnanpa.com/pdf/PL_556.pdf|date=January 8, 2021|publisher=North American Numbering Plan Administrator |title=Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Hotline)|access-date=March 9, 2021}}</ref>
-==Cities in the 925 area code==
+==Service area==
 ===Alameda County===
 {{div col|colwidth=20em}}
 *[[Altamont, California|Altamont]]
-*[[Dougherty, California|Dougherty]]
+*[[Dougherty, Alameda County, California|Dougherty]]
 *[[Dublin, California|Dublin]]
 *[[East Pleasanton, California|East Pleasanton]]
@@ Line 55: / Line 57: @@
 *[[Pittsburg, California|Pittsburg]]
 *[[Pleasant Hill, California|Pleasant Hill]]
-*[[Port Costa, California|Port Costa]]
 *[[San Ramon, California|San Ramon]]
 *[[Saranap, California|Saranap]]
@@ Line 66: / Line 67: @@
 ==See also==
 *[[List of California area codes]]
+==References==
+{{Reflist}}
 ==External links==
 {{Area_code_footer|Map=CA}}
 *[http://docs.cpuc.ca.gov/Published/Graphics/7344.PDF Report on the 925 area code] produced by the [[California Public Utilities Commission]], Telecommunications Division
-* [https://web.archive.org/web/20090414225046/http://www.areacodedownload.com/925/index.html List of exchanges from AreaCodeDownload.com, 925 Area Code]
 {{Area code box | State = CA
-| This = area code 925
+| This = 925
-| N = [[area code 707|707]], [[area code 916|916]]
+| N = [[area codes 707 and 369|707/369]], [[area codes 916 and 279|916/279]]
 | S = [[area codes 408 and 669|408/669]]
-| E = [[area code 209|209]]
+| E = [[area codes 209 and 350|209/350]]
 | W = [[area codes 510 and 341|510/341]]
 }}