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618 Area Code

Area code 618 serves Belleville, Carpentersville, O'Fallon, Granite City, Edwardsville and nearby communities in Illinois. It has been in service since January 1, 1947.

StateIllinois
Time zoneCentral
Local time now…
Prefixes in use786
Overlay with730
Projected to run out2040
BellevilleCarpentersvilleO'FallonGranite CityEdwardsvilleAltonCollinsvilleCarbondaleEast St. LouisGodfreyMarionCahokia HeightsFairview HeightsShilohSwanseaMount VernonGlen CarbonHerrinTroyCentraliaWaterlooColumbiaWood RiverHighlandMascoutahBethaltoGilbertsWest DundeeMaryvilleJerseyvilleOlneyHarrisburgGreenvilleRobinsonVandaliaWest FrankfortSalemMurphysboroChesterMount CarmelBentonPontoon BeachCartervilleMetropolisEast AltonDu QuoinBellevilleCarpentersvilleEdwardsvilleCarbondale
Cities and towns served by area code 618

Who issues 618 numbers

Mobile 26%VoIP and cable 18%Landline 56%

Share of the 786 prefixes (the three digits after 618) assigned to each type of carrier. Classification by carrier name, approximate.

CarrierPrefixes
Frontier170
AT&T (Illinois Bell)111
AT&T Mobility98
Verizon Wireless62
Lumen (Level 3)46
T-Mobile40
Onvoy (Sinch)30
Bandwidth21

Cities and towns in area code 618

CityPopulationOther area codes
Belleville40,237730
Carpentersville37,045
O'Fallon32,656730
Granite City26,807730
Edwardsville26,463
Alton25,013730
Collinsville23,717730
Carbondale21,811730
East St. Louis17,682730
Godfrey17,620730
Marion17,148730
Cahokia Heights16,874730
Fairview Heights16,175730
Shiloh14,604730
Swansea14,356730
Mount Vernon14,187730
Glen Carbon13,898
Herrin12,268730
Troy11,893730
Centralia11,863730
Waterloo11,132
Columbia10,865730
Wood River10,224
Highland10,042
Mascoutah9,239
Bethalto9,202
Gilberts9,082
West Dundee8,570
Maryville8,413
Jerseyville8,409
Olney8,347730
Harrisburg7,922
Greenville7,469
Robinson7,283
Vandalia7,108
West Frankfort7,105
Salem7,035730
Murphysboro6,977730
Chester6,847
Mount Carmel6,723

Showing the 40 largest of 46 places with 5,000+ residents.

Got a call from 618?

A 618 number was originally issued in Illinois, but that does not prove the caller is there. 18% of 618 prefixes belong to VoIP and cable providers, whose numbers can be bought online and used from anywhere. Caller ID can also be spoofed, so treat urgent requests for money, codes or passwords from any area code with suspicion, and call back on a number you already know.

All 786 prefixes in area code 618

Format: (618) XXX-YYYY. Carrier is the company the block was originally assigned to; numbers may since have been ported to another carrier.

Questions about area code 618

Where is area code 618?
Area code 618 is in Illinois. It covers Belleville, Carpentersville, O'Fallon, Granite City, Edwardsville, Alton and 40 more cities and towns.
What time zone is area code 618?
Area code 618 is in the Central time zone.
Is 618 a toll-free number?
No. 618 is a geographic area code in Illinois. Toll-free numbers in the US start with 800, 833, 844, 855, 866, 877 or 888.
Why does 618 share its area with 730?
618 and 730 form an overlay: they cover the same territory, so new numbers there can get any of these codes, and local calls need all 10 digits.
Will area code 618 run out of numbers?
NANPA's latest forecast projects the 618/730 overlay to exhaust in the fourth quarter of 2040. Before that happens, a new area code is usually added as an overlay; existing numbers keep their code.

Other area codes in Illinois