331 Area Code

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Area code 331 was introduced as an overlay to area code 630, serving the western suburbs of Chicago, Illinois. Rather than replacing existing numbers, the 331 overlay provides additional numbering options for the same geographic region, which includes major cities like Aurora, Naperville, Wheaton, and Elmhurst.
The overlay ensures that new residents, businesses, and organizations in this growing area can continue to receive local numbers — without disruption to those already using the 630 area code.

Why Choose a 331 Area Code?

If you're launching a new business or expanding your reach into the greater Chicago suburbs, a 331 phone number gives you a trusted local presence without the limitations of aging number pools.
This area code is ideal for local service providers, tech startups, healthcare clinics, and distributed teams that want to connect with customers in the 630/331 region. With DialLink, you don’t just get a phone number — you get a full-featured AI-powered cloud phone system designed to help your team communicate clearly, efficiently, and professionally.

Why Get a Illinois Phone Number with DialLink?

When you choose a local number from DialLink, you get more than just a number:

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

Customize call flows, routing, and voicemail rules

Work from anywhere

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

Plug-and-play setup

Get started in minutes with no IT experts required

AI-powered business messaging

Get AI-generated suggestions and send replies instantly

Whether you're based in Illinois or simply want to break into the market, DialLink's numbers help your business sound local, feel accessible, and stay organized.

Who Can Benefit from a Local Phone Number:

New businesses opening in the western Chicago suburbs

Remote teams and virtual firms targeting the Illinois market

Local service providers needing reliable call handling

Professionals in legal, real estate, or healthcare fields

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
Start making and receiving calls instantly via mobile, desktop, web, or desk phones

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Expand Beyond Area Code 331

DialLink supports local and international numbers in 100+ countries, making it easy to grow your business wherever opportunity calls. Add phone numbers in neighboring area codes or new markets — all from the same platform.

Frequently Asked Questions

What area code is 331?

The 331 area code is an overlay for the 630 area code, serving Chicago’s western suburbs in northeastern Illinois.

What cities are in the 331 area code?

The 331 area includes cities such as Aurora, Naperville, Wheaton, Elmhurst, Downers Grove, and Lombard.

What is the 331 area code an overlay for?

331 is an overlay for the 630 area code. Both area codes cover the same geographic area in Illinois.

What is an overlay area code?

An overlay area code is added to the same geographic region as an existing area code. It allows for more phone numbers without changing any current ones.

What area codes are from Illinois?

Illinois has several area codes including 217, 224, 309, 312, 331, 447, 464, 618, 630, 708, 773, 779, 815, and 847.

Ready to Build Your Presence in Illinois?

Start today with DialLink's AI-powered cloud phone system and secure your local number. Project professionalism, build trust, and scale your customer communications with ease.

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