312 Area Code

Port Your Number or Get a Chicago Overlay Code with DialLink

Establish a Strong Local Presence in Chicago

No Office Needed

A 312 number connects your business to the heart of Chicago. Covering the city's central areas, this iconic area code lends instant credibility, whether you're based locally or serving customers remotely. While new 312 numbers are mostly unavailable due to limited supply, you can still port your existing number to DialLink. Looking for something new? Area codes 773 and 872 are official overlays for the same region, offering full coverage of the Windy City.
With DialLink, you don't just get a Chicago number — you get a full-featured, AI-powered cloud phone system. It's simple to set up, packed with automation, and built to help SMBs and startups grow.

Why Choose a 312 Area Code?

Area code 312 is one of Chicago's original area codes, covering the city's central business district including the Loop. It's associated with business, finance, tech, and culture — making it a powerful choice for local credibility and brand trust.

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

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

SMBs entering the Chicago market

Businesses seeking higher call pickup in Illinois

Remote teams building regional credibility

Startups looking for a trustworthy image in the city

How to Get a Local Number with DialLink

Sign up for any DialLink plan
Port your existing 312 number or select available 773 and 872 overlays
Start making and receiving calls instantly via mobile, desktop, web, or desk phones

Choose Your Local Phone Number

Expand Beyond Area Code 312

DialLink provides local and international numbers in 100+ countries. Whether you're expanding across the U.S. or reaching global customers, we've got your communications covered.

Frequently Asked Questions

Where is area code 312?

312 covers downtown Chicago, including the Loop and central business areas of the city.

What is the overlay for the 312 area code?

The 312 area code is overlaid by 773 and 872. All three codes serve the same geographic region within Chicago.

What are the area codes for Illinois?

Illinois area codes include 312, 773, 872, 217, 618, 708, 847, and others. Overlays like 872 help meet demand as numbers run out.

What is an overlay area code?

An overlay area code is assigned to the same geographic region as an existing area code. It allows more phone numbers to be issued without affecting existing ones.

How many area codes are in the USA?

There are over 300 active area codes in the United States, with more added regularly to keep up with demand.

Is there a pattern to area codes in US phone numbers?

Originally assigned by geography and population size, area codes now follow overlays and other rules to keep up with growth, making them more flexible, though less geographically consistent.

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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