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Area Code 618 Location & Details

State / Region: Illinois • Country: United States

Major Cities Covered: Belleville, O'fallon, Granite City, Edwardsville, Alton, Collinsville, Carbondale, East St. Louis, Godfrey, Marion

Standard Dial Format
+1 (618) XXX-XXXX
Country Code: +1 (NANP Format)
What State is Area Code 618?
IllinoisState Hub →
Country Territory
United States
618 Area Code Time Zone
Central
618 Overlay Codes
730

Area Code 618 Geographic Map

Interactive location bounds and coverage area for Illinois (Central Timezone)

Lat: 38.52° • Lng: -89.43°
📍 Geographic Center: IllinoisMap data © OpenStreetMap contributors

Where is Area Code 618 Located?

Telephone area code 618 is assigned to Illinois in United States. It serves cities and metropolitan communities including Belleville, O'fallon, Granite City, Edwardsville, Alton, Collinsville, Carbondale, East St. Louis, Godfrey, Marion.

Historical Context & Area Code Overlay Information:618 serves Illinois (United States).

For local and long-distance calls within area code 618, standard 10-digit dialing (618) XXX-XXXX applies.

Who Called Me from Area Code 618?

Received an unknown call, missed call, or text scam from area code 618? Here is how to trace who is calling from 618 area code and verify unknown numbers safely:

1.
Identify Missed Calls & Voicemails:

Legitimate contacts usually leave a detailed voicemail or caller ID record.

2.
Watch Out for Neighbor Spoofing:

Robocallers often fake incoming caller ID numbers using your local 618 prefix to boost pick-up rates.

3.
Reverse Phone Lookup Area Code 618:

Search public white-pages or use caller intelligence guides before returning unfamiliar calls.

Learn How Reverse Phone Lookups Work→

How to Call Area Code 618 & Dialing Format

When placing a phone call to a number in area code 618, follow the correct dialing format depending on your calling location:

  • Calling from inside the US / Canada (+1): Dial 1 + (618) + 7-digit number.
  • Calling from an international location outside +1: Dial your country's international exit code (e.g. 011 in US or + on mobile) + 1 + 618 + 7-digit number.
  • Do I need to dial area code 618 for local calls? Yes, 10-digit dialing (area code + line number) is mandatory across North American telephone networks.

Top Cities & Municipalities Served in Area Code 618

Urban centers, census places, and communities within the +1-618 calling area

50 Major Cities Listed
City NameCountyPopulation% of 618 Pop
BellevilleSt. Clair County40,2376.8%
O'fallonSt. Clair County32,6565.5%
Granite CityMadison County26,8074.5%
EdwardsvilleMadison County26,4634.5%
AltonMadison County25,0134.2%
CollinsvilleMadison County23,7174.0%
CarbondaleJackson County21,8113.7%
East St. LouisSt. Clair County17,6823.0%
GodfreyJersey County17,6203.0%
MarionWilliamson County17,1482.9%
Cahokia HeightsSt. Clair County16,8742.8%
Fairview HeightsSt. Clair County16,1752.7%
ShilohSt. Clair County14,6042.5%
SwanseaSt. Clair County14,3562.4%
Mount VernonJefferson County14,1872.4%
Glen CarbonMadison County13,8982.3%
HerrinWilliamson County12,2682.1%
TroyMadison County11,8932.0%
CentraliaMarion County11,8632.0%
WaterlooMonroe County11,1321.9%

Counties Covered by Area Code 618

Geographic county distribution and population coverage across Illinois

County NameTotal Population% of 618 Area% of County
Madison County263,31730.6%69%
St. Clair County251,37528.0%66%
Williamson County67,0745.9%53%
Jackson County52,6824.8%55%
Jersey County21,1554.4%100%
Monroe County35,1053.7%63%
Marion County36,5013.2%52%
Jefferson County36,1122.4%39%
Franklin County36,9542.3%37%
Perry County20,3761.8%51%
Richland County15,3681.4%54%
Saline County22,8301.3%35%
Bond County16,6001.3%45%
Crawford County18,6211.2%39%
Fayette County20,9541.2%34%
Randolph County29,8701.2%23%
Wabash County11,0261.1%61%
Massac County13,6161.0%42%
Wayne County15,8830.8%30%
Kankakee County105,8140.8%4%
Clay County12,8450.8%36%
White County13,4490.8%34%

☎️Area Code 618 Exchange Prefixes & Carriers

Showing 50 of 800 central office 3-digit prefixes and assigned telecom carriers

66% Landline27% Wireless7% VoIP
PrefixLine UsageRate CenterAssigned CarrierAssign Date
(618) 200-📱WirelessBENTONCELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL01/05/2011
(618) 201-📱WirelessCARBONDALECELLCO PARTNERSHIP DBA VERIZON WIRELESS - ILN/A
(618) 202-📱WirelessANNANEW CINGULAR WIRELESS PCS, LLC - IL11/15/2011
(618) 203-📱WirelessCARBONDALET-MOBILE USA, INC.N/A
(618) 204-📱WirelessMT VERNONT-MOBILE USA, INC.N/A
(618) 205-📞LandlineGLENCARBONPAETEC ITEL, LLCN/A
(618) 206-📞LandlineO FALLONPAETEC ITEL, LLCN/A
(618) 207-📞LandlineBELLEVILLELEVEL 3 COMMUNICATIONS, LLC - IL06/11/2002
(618) 208-📞LandlineALTONPAETEC ITEL, LLCN/A
(618) 209-📞LandlineGOLCONDATELNYX LLC12/09/2019
(618) 210-📱WirelessCOLLINSVLNEW CINGULAR WIRELESS PCS, LLC - ILN/A
(618) 211-📞LandlineXXXXXXXXXXMULTIPLE OCN LISTINGN/A
(618) 212-📞LandlineBELLEVILLEPAETEC ITEL, LLCN/A
(618) 213-📞LandlineEDGEMONTPAETEC ITEL, LLCN/A
(618) 214-📱WirelessMT VERNONCELLCO PARTNERSHIP DBA VERIZON WIRELESS - ILN/A
(618) 215-📞LandlineE ST LOUISPAETEC ITEL, LLCN/A
(618) 216-📞LandlineWOOD RIVERPAETEC ITEL, LLCN/A
(618) 217-📱WirelessWOOD RIVERT-MOBILE USA, INC.06/01/2017
(618) 218-📱WirelessBENTONCELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL10/30/2002
(618) 219-📞LandlineGRANITE CYPAETEC ITEL, LLCN/A
(618) 220-📞LandlineBELLEVILLEILLINOIS BELL TEL CO01/30/2007
(618) 221-💻VoIPBREESEPEERLESS NETWORK OF ILLINOIS, LLC - IL10/30/2012
(618) 222-📞LandlineBELLEVILLEILLINOIS BELL TEL CON/A
(618) 223-📞LandlineCOLLINSVLLEVEL 3 COMMUNICATIONS, LLC - ILN/A
(618) 224-📞LandlineTRENTONILLINOIS BELL TEL CON/A
(618) 225-📞LandlineGRANITE CYILLINOIS BELL TEL CON/A
(618) 226-📞LandlineSHATTUCCITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -ILN/A
(618) 227-📞LandlineBECKEMEYERILLINOIS BELL TEL CON/A
(618) 228-📞LandlineAVISTONILLINOIS BELL TEL CON/A
(618) 229-📞LandlineBELLEVILLEILLINOIS BELL TEL CON/A
(618) 230-📞LandlineEDGEMONTTELEPORT COMMUNICATIONS AMERICA, LLC - IL05/23/2011
(618) 231-📱WirelessCENTRALIANEW CINGULAR WIRELESS PCS, LLC - ILN/A
(618) 232-📞LandlineHAMBURGCITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -ILN/A
(618) 233-📞LandlineBELLEVILLEILLINOIS BELL TEL CON/A
(618) 234-📞LandlineBELLEVILLEILLINOIS BELL TEL CON/A
(618) 235-📞LandlineBELLEVILLEILLINOIS BELL TEL CON/A
(618) 236-📞LandlineBELLEVILLEILLINOIS BELL TEL CON/A
(618) 237-📱WirelessCENTRALIANEW CINGULAR WIRELESS PCS, LLC - ILN/A
(618) 238-📞LandlineEDGEWOODCITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -ILN/A
(618) 239-📞LandlineBELLEVILLEILLINOIS BELL TEL CON/A
(618) 240-📱WirelessMT CARMELCELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL03/29/2005
(618) 241-📞LandlineMT VERNONILLINOIS BELL TEL CON/A
(618) 242-📞LandlineMT VERNONILLINOIS BELL TEL CON/A
(618) 243-📞LandlineOKAWVILLEFRONTIER NORTH, INC. - ILN/A
(618) 244-📞LandlineMT VERNONILLINOIS BELL TEL CON/A
(618) 245-📞LandlineFARINACITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -ILN/A
(618) 246-📞LandlineMT VERNONILLINOIS BELL TEL CON/A
(618) 247-📞LandlineSANDOVALCITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -ILN/A
(618) 248-📞LandlineALBERSFRONTIER NORTH, INC. - ILN/A
(618) 249-📞LandlineIRVINGTONCITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -ILN/A

Frequently Asked Questions about Area Code 618

Where is area code 618 located?

Area code 618 is located in Illinois (United States), serving cities like Belleville, O'fallon, Granite City, Edwardsville, Alton, Collinsville, Carbondale, East St. Louis, Godfrey, Marion.

What timezone is area code 618?

Area code 618 operates in the Central timezone.

What state is area code 618?

Area code 618 is assigned to the state / telecom territory of Illinois.

Is area code 618 a scam or dangerous?

Area code 618 is an official geographic area code for Illinois. However, beware of robocaller spoofing.

Illinois State Area Codes

View complete directory of telephone area codes assigned to Illinois.

Explore Illinois Directory

Get a 618 Business Phone Number

How to acquire a virtual phone number or business line with area code 618 for local customer trust in Illinois.

Get 618 Business Number
🛡️ Scam & Safety Directory

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Overlay & Nearby Area Codes for Illinois

Explore neighboring telecom prefixes sharing geographical boundaries with area code 618.

730
Central
Area Code 730
Belleville, O'fallon, Granite City, Edwardsville, Alton, Collinsville, Carbondale, East St. Louis, Godfrey, Marion
217
Central
Area Code 217
Springfield, Champaign, Decatur, Urbana, Quincy, Danville, Jacksonville, Charleston, Mattoon, Chatham
224
Central
Area Code 224
Elgin, Waukegan, Schaumburg, Evanston, Arlington Heights, Skokie, Palatine, Des Plaines, Mount Prospect, Hoffman Estates
309
Central
Area Code 309
Peoria, Bloomington, Normal, Moline, Romeoville, Rock Island, Pekin, Galesburg, East Peoria, Crest Hill
312
Central
Area Code 312
Chicago, West Chicago
331
Central
Area Code 331
Aurora, Naperville, Schaumburg, Bolingbrook, Wheaton, Downers Grove, Elmhurst, Lombard, Bartlett, Oswego