Illinois Area Codes
Illinois Area Codes
Blog Article
Complete Guide to Illinois Phone Area Codes
Need to identify or obtain an Illinois-based phone number? This detailed guide dives into lookup tools, city-based breakdowns, and more.
No matter if you’re launching a business or tracing a call, knowing the dialing system across IL helps Illinois telephone codes with routing calls, marketing, and compliance.
How Illinois Phone Codes Work
Illinois telephone area codes identify specific geographic territories, allowing calls to be directed accurately.
Structured by the NANP, Illinois codes align with the NANP guidelines used across North America. For official standards, visit NANPA’s website.
Illinois Area Code List
Below is a current list showing city coverage and overlays:
- 217 – Central Illinois including Springfield
- 309 – Western central Illinois
- 312 – Central Chicago zone
- 773 – Northwest and South Side of Chicago
- 872 – Overlay for 312 and 773
- 847 – Northern suburbs including Evanston
- 224 – Overlay for 847
- 630 – Western suburbs
- 331 – Overlay for 630
- 708 – Oak Lawn, Cicero
- 815 – Rockford and northern IL
- 779 – Overlay for 815
- 464 – Newest overlay for Chicago
To learn more about official overlays and numbering plans, visit the FCC Area Code Resources.
Illinois Area Code Search Tools
There are many reliable lookup tools that help you identify the area code for a city or trace a phone call.
- 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
Using Illinois Phone Codes for Business Presence
Businesses operating in or targeting Illinois use local area codes to establish trust, improve response rates, and localize presence.
Using VoIP and virtual phone systems, getting a number with an Illinois area code is now easy and affordable.
Looking to get started? Check out Bling’s virtual number options today.
Illinois Area Code Overlays
Illinois uses overlay area codes to handle the increasing demand for phone numbers.
These are the current overlays used in Illinois:
- 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)
Users must now dial 10 digits, even for local calls, due to overlays.
Regional Breakdown: Northern, Central, and Southern Illinois Area Codes
Illinois is divided into three primary telephone regions: North, Central, and South.
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
Illinois Area Codes & VoIP Technology
VoIP lets you use any area code in Illinois without a physical presence.
This flexibility helps businesses scale, reach target markets, and streamline support.
How to Get a Local Number in Illinois
It also helps with branding, geo-targeting, and customer service.
You can register a business phone number with any Illinois code through platforms like Bling.
It’s also scalable for multiple team members and departments.
Illinois Area Code: Common Questions Answered
Chicago phone codes?
872 is an overlay for both.
Illinois city phone lookup?
Use tools like TrueCaller, Whitepages, or check Wikipedia’s Illinois area code list.
Illinois latest phone codes?
It launched to prevent number shortages.
Can I get a virtual phone number with an Illinois area code?
VoIP lets you use IL area codes even if you live elsewhere.
What happens if two people have the same area code?
Overlays allow reuse of area codes without conflict.