Look up any phone number starting with 840 to identify the owner name, address, spam reports, and more. The 840 area code covers the far-eastern part of Los Angeles County, southwestern San Bernardino County, and a small portion of Riverside County in California.
Look Up an 840 Phone Number
Enter a full 10-digit number to identify the caller and whether it has been reported as spam.
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/840
Where Is Area Code 840 Located?
Area code 840 covers a region in Southern California, specifically including portions of Los Angeles County, San Bernardino County, and Riverside County.
Area code 840 is an overlay to area code
909
. This means that both area codes serve the same geographic region. Area code 909 was created in 1992, and area code 840 was added in 2021. Ten-digit dialing is required for all calls in this region.
Area Code 840 Location Map
Area code 840 is a general purpose code which was placed in service on February 23, 2021.
Phone Number Prefixes and Carriers
Our California phone number lookup for the 840 area code analyzes the three-digit prefix to identify the initially assigned telecommunications company and rate center. This prefix code data may help to determine the U.S. carrier, California geographic region, and local calling area associated with the phone number.
Phone numbers follow the following structure under the North American Numbering Plan:
NPA- area code (where the number was originally assigned)
NXX - Central office code that locates the specific neighborhood and identifies the service provider
XXXX - Subscriber number identifies the individual phone line within that local exchange
Understanding the area code can help you determine if a call is local to your area. However, keep in mind that due to mobile number portability and VoIP services, the caller may be anywhere in the United States, so it’s best to search for the most recent phone number details.
Prefixes by Company
Company
Number of Prefixes
Carrier names have been updated from their original FCC assignments to reflect current companies following mergers, acquisitions, and rebranding. Updates were determined using AI-assisted research and may not be accurate or reflect up to date changes. This data is provided without warranties of accuracy or completeness.
Prefixes by Rate Center
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Number of Prefixes
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