AreaCodeLocations.info
Share

Illinois area codes

The state of Illinois, USA is currently served by a total of 15 area codes:

Overlaying area codes

These Illinois area codes overlay (cover the same geographic area). The first code listed is the parent code. Overlay area codes are added when no more phone numbers are available in an existing Numbering Plan Area.

  • 217/447
  • 312/872
  • 630/331
  • 708/464
  • 773/872
  • 815/779
  • 847/224

Larger Illinois cities and their area codes

City CountyArea code(s)
AddisonDupage 630/331
AlgonquinMcHenry 847/224
Arlington HeightsCook 847/224
AuroraKane 630/331
BartlettDupage 630/331
BellevilleSt Clair 618
BerwynCook 708/464
BloomingtonMcLean 309
BolingbrookWill 630/331
Buffalo GroveLake 847/224
Calumet CityCook 708/464
Carol StreamDupage 630/331
CarpentersvilleKane 847/224
ChampaignChampaign 217/447
ChicagoCook 773/872
Chicago (downtown area)Cook 312/872
CiceroCook 708/464
Crystal LakeMcHenry 815/779
DanvilleVermilion 217/447
DecaturMacon 217/447
DekalbDekalb 815/779
Des PlainesCook 847/224
Downers GroveDupage 630/331
ElginKane 847/224
Elk Grove VillageCook 847/224
ElmhurstDupage 630/331
EvanstonCook 847/224
GalesburgKnox 309
Glendale HeightsDupage 630/331
GlenviewCook 847/224
GurneeLake 847/224
Hanover ParkCook 630/331
Hoffman EstatesCook 847/224
JolietWill 815/779
LombardDupage 630/331
MolineRock Island 309
Mount ProspectCook 847/224
MundeleinLake 847/224
NapervilleWill 630/331
NormalMcLean 309
NorthbrookCook 847/224
Oak LawnCook 708/464
Oak ParkCook 708/464
Orland ParkCook 708/464
OswegoKendall 630/331
PalatineCook 847/224
Park RidgeCook 847/224
PekinTazewell 309
PeoriaPeoria 309
PlainfieldWill 815/779
QuincyAdams 217/447
Rock IslandRock Island 309
RockfordWinnebago 815/779
RomeovilleWill 815/779
SchaumburgCook 847/224
SkokieCook 847/224
SpringfieldSangamon 217/447
St CharlesKane 630/331
StreamwoodCook 630/331
Tinley ParkCook 708/464
UrbanaChampaign 217/447
WaukeganLake 847/224
WheatonDupage 630/331
WheelingCook 847/224
WoodridgeDupage 630/331