Business phone numbers in Illinois
1,315,000+ local numbers available now, from Des Plaines, Dundee, Rock Island and across the state. Pick one, and it's ringing in minutes.
- 1,315,000+
- numbers available
- 16
- area codes with stock
- 813
- local calling areas
- Free
- porting, any volume
Find your Illinois number
These are real numbers available right now. Pick a town to narrow it down, or search for a pattern or vanity word.
Showing live inventory
Every number here stays on the open market until someone claims it — we can't hold one for you. We acquire it for your account right after you sign up, subject to availability, and let you know when it's ready.
Your first number comes out of your $25 — $3.50 for the first month, leaving $21.50 to spend on calls. Nothing to pay, no card.
Doing business by phone in Illinois
Chicago is the Midwest's business capital, with finance, logistics, food processing and a huge professional-services sector, and its suburbs split into a patchwork of area codes. Downstate Illinois runs on agriculture, manufacturing and the universities in Champaign and Carbondale.
- Capital
- Springfield
- Largest metros
- Chicago, Aurora, Naperville, Rockford
- Time zone
- Central
- Area codes with stock
- 312, 872, 773, 847, 224, 630, 331, 708, 464, 815, 779, 217, 447, 309, 618, 730
- Inventory checked
- November 4, 2026
Illinois area codes with numbers in stock
Counts are from our carriers as of November 4, 2026. Each code lists a few of the towns it reaches.
Illinois towns with the most numbers
Tap a town to see its numbers. Every other town in Illinois is in the full search.
Sell phone service to Illinois businesses under your own name
SimuWave is the carrier behind it. You brand it, price it and own the customer, and we handle the numbers, the network, E911 and the paperwork. Same published rates in every state.
Illinois phone numbers: common questions
What area codes can I get in Illinois?
Right now we have numbers in 16 Illinois area codes: 312, 872, 773, 847, 224, 630, 331, 708, 464, 815, 779, 217, 447, 309, 618, 730. The most stock is in 312, which reaches Chicago. Stock changes daily, so search for the exact town you want.
Can I get a number in a specific Illinois town?
Yes. Numbers are tied to a local calling area, so pick the town your customers are in and the number reads as local to them. Des Plaines, Dundee, Rock Island have the deepest stock right now. Search above, or open the full search with every town in Illinois.
Can I keep my existing Illinois business number?
Yes. Porting is free, in any volume. Keep the number your customers already know and point it at SimuWave. It can ring desk phones and cell phones at the same time.
How fast can an Illinois number be working?
A new number is live in minutes: choose it, attach a call flow, and it rings. Ports take longer because the current carrier has to release the number, and the number keeps working on the old service until the port completes.
What time zone should I set for Illinois business hours?
Illinois is on Central time. Set your business hours once in the call flow, and after-hours calls go to voicemail, an answering service or a cell phone automatically.
States next to Illinois
Photo: Chicago Riverwalk, by ajay_suresh (Wikimedia Commons), CC BY 2.0. Resized.