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Illinois · Central Time Updated July 2026

Area Codes in Illinois

10 codes, from a 1947 original to 2022’s newest, and an 11th on the way

Illinois has 16 active area codes — from 217 in 1947 to 730 in 2023. 9 serve metro Chicago (224, 312, 464, 630, 708, 773, 815, 847, 872); two serve metro Springfield (217, 447); 309 is Peoria and its surroundings. Tap any code below for its full guide: who called, cities and ZIP codes, the coverage map and the live local time.

Not sure which code is yours? Every Illinois city is covered below. Find your city ›
Area codes16
Original217 · 1947
Newest730 · 2023
Largest metroChicago
Local time3:10 AM CT
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All 16 Illinois Area Codes

Every active code: tap any card for its full guide, who called, cities and ZIPs, map, spam patterns and local time.

217Altamont, Arcola, Athens786 prefixes in serviceArea code 217 guide ›224Algonquin, Antioch, Arlington Heights594 prefixes in serviceArea code 224 guide ›309Aledo, Altona, Anchor782 prefixes in serviceArea code 309 guide ›312Bedford Park, Chicago, Cicero785 prefixes in serviceArea code 312 guide ›331Aurora, Geneva222 prefixes in serviceArea code 331 guide ›447Altamont, Arcola, Athens213 prefixes in serviceArea code 447 guide ›464Alsip, Bannockburn, Barrington Hills105 prefixes in serviceArea code 464 guide ›618Addieville, Albers, Albion786 prefixes in serviceArea code 618 guide ›630Addison, Arlington Heights, Aurora783 prefixes in serviceArea code 630 guide ›708Alsip, Bannockburn, Barrington Hills783 prefixes in serviceArea code 708 guide ›730Addieville, Albers, Albion127 prefixes in serviceArea code 730 guide ›773Chicago, Cicero, Evanston785 prefixes in serviceArea code 773 guide ›779Belvidere, Custer Park, Genoa348 prefixes in serviceArea code 779 guide ›815Amboy, Arlington, Aroma Park786 prefixes in serviceArea code 815 guide ›847Algonquin, Antioch, Arlington Heights786 prefixes in serviceArea code 847 guide ›872Chicago, Cicero, Evanston273 prefixes in serviceArea code 872 guide ›
Got a call from a Illinois number you don’t recognize? Open that code’s guide above for its full prefix lookup. AT&T ActiveArmor® blocks spam automatically, included with AT&T wireless plans.Requires compatible device/service and download of the AT&T ActiveArmor® app. Other terms & restrictions apply. May not detect all threats and may block wanted calls. Some features require Advanced mobile security ($7/mo.). See how ActiveArmor works

Why Metro Chicago Has 9 Area Codes

When a region uses more numbers than one code can hold, new codes are overlaid on the same territory rather than forcing anyone to change numbers. Metro Chicago now uses 224, 312, 464, 630, 708, 773, 815, 847 and 872: same neighborhoods, ten-digit dialing, and every one of them covered by its own guide above.

Illinois Area Codes by City

The largest Illinois communities and the area codes that serve them. Every city links to its local AT&T internet page.

CityArea code(s)
Chicago224 312 464 630 708 773 815 847 872
Springfield217 447
Aurora331 630
Champaign217 447
Schaumburg224 464 630 708 847
Belleville618 730
Bloomington309
Bolingbrook630 815
Danville217 447
Decatur217 447
Downers Grove464 630 708
Joliet464 708 779 815
Naperville630 847
Niles773 847 872
Oakbrook Terrace464 630 708
Orland Park464 708
Peoria309
Skokie224 773 847 872

How Illinois Got Its Codes

Every Illinois area code, in the order it entered service. Splits carved new regions; added codes overlay existing ones, which is why ten-digit dialing is standard.

In serviceCodeHow it arrived
1947217One of the original area codes of 1947
1947312One of the original area codes of 1947
1947618One of the original area codes of 1947
1947815One of the original area codes of 1947
1957309Original assignment for its region
1989708Added to the 312 region
1996630Added to the 708 region
1996773Added to the 312 region
1996847Added to the 708 region
2002224Added to the 847 region
2007331Added to the 630 region
2007779Added to the 815 region
2009872Added to the 312 region
2021447Added to the 217 region
2022464Added to the 708 region
2023730Added to the 618 region

Source: NANPA NPA database, July 2026. Regenerated monthly.

Illinois Area Code Map

Every active Illinois area code at a glance, anchored to the metro each one serves. Tap any code above for its detailed coverage map.

Map of Illinois area codes with anchor cities↓  Printable PDF

Open the printable Illinois area code map (PDF) — poster format with a QR code back to this page.

AT&T IN GEORGIA

Internet, wireless & stores across the state

All AT&T services in Illinois Home internet in Illinois Wireless plans AT&T stores in Illinois

AT&T Home Internet in Illinois

AT&T home internet is available across Illinois, checked address by address; every area code guide above lists its cities and what’s offered there.

No data capsNo annual contractNo equipment fees

AT&T Fiber: Ltd. avail/areas. Speeds based on wired connection. Actual speeds vary. For 5-GIG, single device wired speed maximum 4.7Gbps. For more info., visit att.com/speed101.

Check availability at your addressAll AT&T services in Illinois ›

Start with home internet in Illinois, or pair it with wireless in an internet + wireless bundle.

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Home internet across IllinoisCheck your address ›

AT&T Wireless in Illinois

AT&T’s 5G network covers most of Illinois. ActiveArmor® spam blocking is included with every unlimited plan, your number stays yours when you move between Illinois codes, and great cell phone deals in Illinois are a tap away.

5G across IllinoisActiveArmor® includedKeep your number

AT&T may temporarily slow data speeds if the network is busy. 5G req’s compatible plan & device. Coverage not available everywhere. Learn more at att.com/5Gforyou.

Shop wireless plansBring your number ›

See the AT&T wireless coverage map for Illinois ›

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Stay connected across IllinoisShop wireless plans ›

AT&T Stores Across Illinois

From the Chicago metro to Schaumburg, Springfield and beyond, walk in for switching, porting, upgrades and hands-on help. Every area code guide lists its nearest stores.

Find your nearest AT&T store

Find stores in: Chicago · Schaumburg · Springfield · Champaign · Aurora

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Area Codes in Neighboring States

Wisconsin area codesIowa area codesMissouri area codesKentucky area codesIndiana area codesAll 50 states ›

Illinois Area Code FAQ

How many area codes does Illinois have?
Illinois has 16 active area codes: 217, 224, 309, 312, 331, 447, 464, 618, 630, 708, 730, 773, 779, 815, 847, 872. Each links to a full guide above.
Which Illinois area code is mine?
Tap any code above to see the communities it serves; each guide lists cities with ZIP codes and a coverage map.
Who called me from a Illinois number?
Open that code's guide and check the prefix lookup: every assigned prefix with its carrier. No voicemail? Let it go — legitimate callers leave messages.
What time zone is Illinois in?
Illinois is primarily on Central time. The live local time is shown at the top of this page.
Does AT&T offer service in Illinois?
Yes — home internet, wireless and retail stores across Illinois. Availability is checked address by address.
Sources: prefix and carrier assignments from the NANPA central-office code registry; population figures from the U.S. Census Bureau; spam-pattern indicators from FTC Do Not Call filings and AT&T ActiveArmor® network telemetry. Facts are rebuilt from these sources at build time; the page regenerates monthly.
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