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Area codes 909 and 840 are telephone area codes in the North American Numbering Plan for the far-eastern part of Los Angeles County and southwestern San Bernardino County in the U.S. state of California.
An area code overlay is a numbering plan area (NPA) in the North American Numbering Plan (NANP) that has multiple area codes assigned. Overlay complexes are used to add central office prefixes in an NPA to increase the number of available telephone numbers.
Overlay Area Codes(added)Overlay Area Codes(base)Location557314St. Louis, Missouri (communities such as, ...324904Jacksonville, Jacksonville Beach, ...Central and southeastern OhioEach NPA is identified by one or more numbering plan area codes (NPA codes, or area codes), consisting of three digits that are prefixed to each local telephone number having seven digits. A numbering plan area with multiple area codes is called an overlay .
May 23, 2024 · Area code 840 is located in California. Get area code location and dialing plans for all phone prefixes in area code 840.
The state of California was divided into three numbering plan areas (NPAs) with distinct area codes: 213, 415, and 916, for the southern, central, and northern parts of the state, respectively. [1] . As of July 2023, California has 38 active area codes.
840 Area Code - Location, Map, Current Time, Prefixes. California. Local time Prefixes How to call. Primary cities: Pomona, Fontana, San Bernardino, Ontario, Chino ... all cities. Overlap with code: 909. Parent code: 909.
