What area code is 840?

The 840 area code is an overlay of the 909 area code, serving parts of San Bernardino County, eastern Los Angeles County, and Riverside County in California.

Where in US is area code 840 located?

Area code 840 is located in Southern California, covering the Inland Empire and parts of eastern Los Angeles County.

What area codes are from California?

California has many area codes, such as 213, 310, 323, 408, 415, 510, 530, 559, 619, 626, 650, 707, 714, 747, 805, 818, 840 / 909, 916, and more.

What is the area code of the United States?

The United States does not have a single nationwide area code. Instead, it uses the North American Numbering Plan (NANP), which assigns unique three-digit codes to each region.

How many unique numbers can there be per area code?

Each area code can support approximately 7.9 million unique phone numbers.

How do area codes on phone numbers work?

Area codes identify specific geographic regions and ensure calls are routed correctly within the NANP system.

Why do landline phone numbers have area codes?

Area codes were created to organize telephone networks, allow for efficient routing, and make long-distance calling possible.

840 Area Code
Get a California Local Phone Number with DialLink

Establish a Local Presence in Southern California

No Office Needed

Looking to connect with customers in Southern California? A 840 area code number gives your business credibility across the same territory serviced by 909 which includes parts of San Bernardino County, eastern Los Angeles County, plus small sections of Riverside County.

With DialLink’s business phone system, SMBs and startups can activate an 840 number quickly. Also, you’ll get advanced call routing, automation, and business messaging tools so your business always sounds local, professional, and responsive.

Why Choose a 840 Area Code?

The 840 area code was introduced as an overlay to the 909 area code on February 23, 2021, providing additional phone numbers for the growing region.

Cities and communities covered by 840 area code include: San Bernardino, Fontana, Ontario, Rancho Cucamonga, Upland, Redlands, Rialto, Colton, Highland, Yucaipa, Pomona, Claremont, La Verne, Diamond Bar, Walnut, West Covina.

This area is home to thriving industries in logistics, manufacturing, retail, healthcare, education, and professional services, making it one of California’s most dynamic business regions.

Core Features for Customer Communications

Make and Receive Calls from Anywhere

DialLink lets you place and answer calls easily from any device, wherever you are. Stay connected with customers while keeping every conversation clear and professional.

View Every Customer Interaction in One Thread

DialLink keeps all communication with each contact in a single thread. See inbound, outbound, and missed calls alongside voicemails, SMS, and WhatsApp messages in one organized view.

Collaborate on Calls and Messages

DialLink allows multiple team members to access the same phone line. Calls, voicemails, and messages are visible to the team, making it easy to manage customer conversations together.

Easy Desk Phone Setup

Give your team the reliability of dedicated desk phones. DialLink works smoothly with many popular desk phone models, making setup simple and quick.

Get More Than a Local Number

When you choose a local number from DialLink, you're getting more than just digits:

AI Voice Agents

Automate routine calls, appointment booking, and more

AI call tagging & summaries

Get insights into calls and improve follow-ups

Advanced call handling

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Work from anywhere

Answer calls on mobile, desktop, web app, or desk phones

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Whether you're in California or thousands of miles away, DialLink helps your business sound local, work smarter, and scale seamlessly.

Who Can Benefit from a Local Phone Number

Startups entering Southern California markets

Remote-first teams serving clients across West Coast

Professional service providers and consultants

Healthcare, education, and logistics businesses

How to Get a Local Number with DialLink

Sign up for any DialLink plan
Pick a local number during setup, or port your existing one
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Choose Your Local Phone Number

Expand Beyond Area Code 840

Southern California today, global tomorrow. With DialLink, you can secure local numbers across California and more than 100 international markets to scale your business effortlessly.

Frequently Asked Questions

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840 Area CodeGet a California Local Phone Number with DialLink