Area code 840 covers San Bernardino and surrounding areas in California. It was activated in 2021 as an overlay of area code 909. Today it shares its territory with overlay code 909. For the full picture, see all California area codes.
| State | California |
|---|---|
| Primary city | San Bernardino |
| Cities also served | San Bernardino, Fontana, Ontario, Rancho Cucamonga, Pomona, Rialto, Upland, Redlands |
| Time zone | Pacific (UTC-8 / UTC-7 DST) |
| Year established | February 23, 2021 |
| Original 1947 NPA? | No |
| Parent code | 909 |
| Overlay codes | 909 |
| Currently in use? | Yes, actively assigned |
| Ten-digit dialing required? | Yes |
Cities Served by Area Code 840
Area code 840 serves Inland Empire — southwestern San Bernardino County, far-eastern Los Angeles County, and a small portion of Riverside County, including the following cities and communities:
- San Bernardino
- Fontana
- Ontario
- Rancho Cucamonga
- Pomona
- Rialto
- Upland
- Redlands
Nearby area codes covering the same broader region include: 909, 951, 626, 714, 657.
How to Get a 840 Phone Number
There are three ways to get a phone number with the 840 area code, each suited to a different need:
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Browse 840 Numbers →- Buy from a premium-number specialist. Companies that hold curated inventories of specific area codes can sell you a 840 number directly, often with a one-time fee and ownership transferred to you (no recurring carrier fees). This is the option for picking a specific memorable number, or for getting an area code that most carriers won’t let you request. Browse our 840 inventory.
- Sign up with a VoIP carrier. Voice-over-IP services (such as Google Voice, OpenPhone, Grasshopper, and many others) can typically provision a 840 number on request, especially for active overlay codes. You won’t usually get to pick the specific number, but you’ll get a working line in the area code. This is the cheapest option for anyone who doesn’t need a particular number.
- Port an existing 840 number. If you already have a 840 phone number with another carrier, you can transfer it (port it) to a new service provider while keeping the number. This works for landlines, cell phones, and VoIP services, though landlines outside of California sometimes can’t accept inbound ports of 840 numbers due to 911 routing rules.
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Frequently Asked Questions
Is the 840 area code still in use?
Yes. 840 is actively assigned to new phone lines in Inland Empire — southwestern San Bernardino County, far-eastern Los Angeles County, and a small portion of Riverside County.
What is the difference between 840 and 909?
Today they share the same geographic territory in California. New phone lines in the area may be assigned either code. The two codes work identically for calling, billing, and service.
What is the parent area code of 840?
Area code 840 is an overlay of 909. Both codes serve the same region of California.
Can I get a 840 number if I don't live in California?
Yes. Phone numbers are no longer tied to a physical address. With VoIP service or a number broker, you can hold a 840 number from anywhere in the world. The number routes to whatever device or carrier you specify.
Is 840 a scam area code?
No. 840 is a legitimate, active area code for Inland Empire — southwestern San Bernardino County, far-eastern Los Angeles County, and a small portion of Riverside County. Like any area code, scammers occasionally spoof 840 caller IDs, but the code itself is heavily used by real California businesses, government offices, and residents.
What is the 840 area code?
Area code 840 is a California telephone area code that serves the Inland Empire region, covering southwestern San Bernardino County, far-eastern Los Angeles County, and a small portion of Riverside County. It is an all-services overlay of area code 909 and went into service on February 23, 2021.
Why was area code 840 created?
840 was created to relieve the exhaustion of available numbers in the 909 area code. The California Public Utilities Commission approved the overlay on July 23, 2019, and it became effective February 23, 2021. Rather than splitting the geographic territory, an overlay was chosen so that existing 909 customers could keep their numbers.
Do I need to dial 10 digits when calling a 840 number locally?
Yes. Because 840 is an overlay sharing the same territory as 909, all local calls within the region require 10-digit dialing (area code + 7-digit number). Dialing only seven digits will not complete the call.
What cities does the 840 area code cover?
The 840 area code covers the same cities as 909, including San Bernardino, Fontana, Ontario, Rancho Cucamonga, Pomona, Rialto, Upland, Redlands, Colton, Highland, Yucaipa, Chino, Diamond Bar, and Claremont, among others in the Inland Empire.
Related Reading
- Why the Right Area Code Matters
- When Did We Start Using Area Codes?
- How Many Area Codes Are In the US?
- Who Invented Area Codes?
Looking for a different code? See the complete US area code directory.
