Illinois Area Codes
Illinois Area Codes
Blog Article
Everything You Should Know About Illinois Area Codes
Need to identify or obtain an Illinois-based phone number? This detailed guide dives into lookup tools, city-based breakdowns, and more.
From local users to virtual phone system seekers, understanding Illinois’ telephone code system is essential for seamless contact and verification.
How Illinois Phone Codes Work
The area code system in Illinois segments regions for organized call routing, supporting phone number management for personal and business use.
Administered by the North American Numbering Plan Administration (NANPA),, the state of Illinois adheres to NANP’s numbering scheme. For official standards, visit NANPA’s website.
Illinois Area Code List
Below is a current list of Illinois area codes organized by coverage area:
- 217 – Covers Springfield, Champaign, and surrounding areas
- 309 – Peoria, Bloomington, and western parts of IL
- 312 – Central Chicago zone
- 773 – Northwest and South Side of Chicago
- 872 – Covers greater Chicago metro
- 847 – North Chicago suburbs
- 224 – Also covers northern suburbs
- 630 – Western suburbs
- 331 – Overlay for 630
- 708 – Southwest Chicago suburbs
- 815 – Rockford and northern IL
- 779 – Overlay for 815
- 464 – Launched to support number exhaustion
To learn more Illinois virtual phone number about official overlays and numbering plans, visit the FCC Area Code Resources.
Illinois Area Code Search Tools
Several trusted databases to find an Illinois area code by city or number.
- TrueCaller – Reverse lookup and spam detection
- Whitepages – Detailed contact search and verification
- Nomorobo – Great for spam and robocall filtering
- YouTube: Illinois Area Codes Explained – Helpful visual resource
- Wikipedia List – See historical and current Illinois codes
Illinois Virtual Numbers for Businesses
Entrepreneurs and service providers rely on local numbers to appear local and trustworthy in customers’ eyes.
Modern business platforms make it simple to buy or assign IL-based numbers.
If you're setting up a professional phone system with a local presence, explore cloud phone platforms from Bling.
Overlay Area Codes in Illinois
To prevent exhaustion of available numbers, Illinois has implemented overlays in many regions.
Here are the main overlays:
- 872 – Overlays 312 and 773 (Chicago)
- 464 – Newest overlay for 708 (Chicago suburbs)
- 224 – Overlays 847 (Northern suburbs)
- 331 – Overlays 630 (Western suburbs)
- 779 – Overlays 815 (Northern Illinois)
Each overlay covers the same geographic region as the original area code.
Regional Breakdown: Northern, Central, and Southern Illinois Area Codes
Phone area codes in Illinois follow regional distributions across the state.
Northern Illinois
- 312, 773, 872 – Chicago metro|Downtown and metro Chicago
- 847, 224 – Evanston, Waukegan, North Shore|Northern suburbs
- 630, 331 – Naperville, Wheaton, Oak Brook|Western suburbs
- 708, 464 – Cicero, Oak Lawn, South suburbs
- 815, 779 – Rockford, Joliet, Kankakee
Central Illinois
- 217 – Springfield, Urbana, Decatur
- 309 – Peoria, Bloomington, Galesburg
Southern Illinois
- 618 – East St. Louis, Carbondale, Belleville
Impact of VoIP on Illinois Numbers
With the rise of cloud calling, VoIP is becoming the preferred method for phone communication in Illinois.
Want to learn more? Visit VoIP-powered Illinois business calling for powerful options.
Buying an Illinois Local Business Number
It also helps with branding, geo-targeting, and customer service.
For example, get an Illinois-based number instantly connects you with your target region.
Explore virtual phone numbers in Illinois today.
Illinois Area Code: Common Questions Answered
Chicago phone codes?
Chicago uses 312, 773, 872, and 464 depending on your exact neighborhood.
How can I search Illinois area codes?
Use tools like TrueCaller, Whitepages, or check Wikipedia’s Illinois area code list.
Did Illinois add any new codes?
Yes, 464 was recently added to overlay 708 in Chicago suburbs.
Can I get a virtual phone number with an Illinois area code?
Yes! Use platforms like Bling to get an instant virtual Illinois number.
Do overlays cause duplicate area codes?
Overlays allow reuse of area codes without conflict.