Illinois fax numbers and area codes
Illinois has 17 area codes in service, and FaxToFax had local fax numbers in 15 of them when we last checked, from 312 in Chicago to 217 in Springfield. Send and receive faxes in your browser, with no fax machine or phone line.
- Area codes17
- In stock15
- Time zoneCentral
- CapitalSpringfield
Illinois on the map of the United States. Select any state to open its page.
Illinois area codes
Illinois has 17 area codes. Codes on the same line cover the same place (overlays), so any of them works for a local number there.
- 312In stock
- 773In stock
- 872In stock
Chicago All 3 codes cover the same area.
- 847None in stock
- 224In stock
Evanston, Schaumburg, Waukegan and the northern suburbs Both codes cover the same area.
- 630In stock
- 331In stock
Naperville, Aurora, Wheaton and the western suburbs Both codes cover the same area.
- 708In stock
- 464In stock
Oak Park, Cicero, Orland Park and the near west and south suburbs Both codes cover the same area.
- 815In stock
- 779In stock
Rockford, Joliet, DeKalb, Kankakee and northern Illinois Both codes cover the same area.
- 309In stock
- 861None in stock · new 2023
Peoria, Bloomington-Normal and the Quad Cities Both codes cover the same area.
- 217In stock
- 447In stock
Springfield, Champaign-Urbana, Decatur and central Illinois Both codes cover the same area.
- 618In stock
- 730In stock · new 2023
Belleville, Carbondale, East St. Louis and southern Illinois Both codes cover the same area.
Local fax numbers in stock None in stock right now
Newest: 730 (July 2023, added to 618) and 861 (February 2023, added to 309).
Area codes in service from NANPA, the North American Numbering Plan Administrator (October 22, 2026). Stock checked October 22, 2026; it changes daily, and the number picker shows what’s available when you sign up.
Sending a fax to Illinois
- Upload a PDF, PNG or JPG, or write a cover page with your letterhead.
- Choose United States as the recipient’s country and type the 10-digit fax number, for example (312) 555-0123.
- Check the number and send. You get a time-stamped delivery receipt.
Each page sent to Illinois uses 1 plan page from a US or Canadian number, and a fax that isn’t delivered doesn’t use any.
Receiving faxes in Illinois
Choose a number with an Illinois area code (217, 224, 309, 312, 331, 447 and more) or a toll-free number. People fax it from any fax machine, and each fax lands in your private, encrypted FaxToFax inbox with an alert.
Moving an existing number to FaxToFax (porting) isn’t available yet.
Time zone. Illinois is on Central Time. If you fax Illinois offices from another time zone, schedule faxes for their business hours.
Healthcare and legal offices in Illinois
Healthcare ›
Clinics, labs and pharmacies in Illinois still exchange referrals, records requests and prior authorizations by fax. If your office handles protected health information, HIPAA applies wherever you are in the US. FaxToFax stores faxes encrypted, records every view and download in an audit log, and deletes faxes on the schedule you set. A Business Associate Agreement is available on Business plans.
Legal ›
Law offices fax notices, signed documents and records requests when they need a sender, a time and a receipt. Lawyers in Illinois must protect client confidences under the state’s rules of professional conduct. FaxToFax puts your letterhead on cover pages, keeps a delivery receipt with every fax, and limits who can open faxes with access roles.
FaxToFax provides tools that support compliance; each office remains responsible for its own obligations. The Trust Center lists the programs we currently meet.
Illinois fax FAQ
Can I get an Illinois fax number?
Yes. When we last checked (October 22, 2026), FaxToFax had local fax numbers in 15 of the 17 area codes Illinois uses: 217, 224, 309, 312, 331, 447, 464, 618, 630, 708, 730, 773, 779, 815 and 872. You pick your number when you sign up, and you can choose a toll-free number instead.
What area codes does Illinois use?
Illinois has 17 area codes in service: 217, 224, 309, 312, 331, 447, 464, 618, 630, 708, 730, 773, 779, 815, 847, 861 and 872.
What time zone is Illinois in?
Illinois is on Central Time.
How do I send a fax to Illinois?
In FaxToFax, choose United States as the recipient’s country and type the 10-digit fax number, for example (312) 555-0123. Each page uses 1 plan page from a US or Canadian number, and you get a time-stamped delivery receipt.
Can I move my current Illinois fax number to FaxToFax?
Not yet. Moving an existing number (porting) isn’t available yet, so you’d choose a new FaxToFax number and give it to the people who fax you.
