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AREA CODE · ILLINOIS

Area code 618

Area code 618 covers Collinsville, Illinois. Map, time zone, overlays, carriers, the full list of prefixes and how to dial it.

State: Illinois Major City: Collinsville Central Time (CT) Overlay: 618/730
01 / WHERE IT IS

Where is area code 618?

Area code 618 is assigned to Collinsville and the surrounding region in Illinois. Calls to numbers that start with 618 are routed to this area.

Area code 618 shares its territory with 730. Because it is an overlay, local calls require dialing all 10 digits.

Counties covered

Madison CountySt. Clair CountyJackson CountyWilliamson CountyMarion CountyJefferson CountyClinton CountyWashington CountyRandolph CountyRichland CountyFranklin CountyFayette CountyMacoupin CountyCrawford CountySaline County

Line types

  • Mobile 28.75%
  • Landline 71.25%
02 / MAP

Area code 618 on the map

The shaded area joins the code’s numbering centers; the marker shows its main city.

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© OpenStreetMap contributors

03 / LOCAL TIME

Current time in Collinsville

This area code is in the Central Time (CT) time zone.

Local timeCollinsville, IL--:--:--

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America/ChicagoLive
04 / HOW TO DIAL

How to call Collinsville

WITHIN THE US618 XXX XXXX

Always 10 digits — landline, mobile or VoIP. Local, long distance or a different state: the format is always the same. You do not need to dial the 1 first.

FROM ABROAD+1 618 XXX XXXX

Exit codes: 00 Europe/Mexico · 011 Canada · 010 Japan · + universal

WHATSAPP / IMESSAGE+1 618 XXX XXXX

Always save the number in international format so messaging apps recognize it correctly:

Call typeTraditional landlineMobile / VoIP
Local (same area code)10 digits10 digits
US long distance1 + 10 digits10 digits
Emergency911911
🌐Universal+1 618 555 0123
🇪🇸🇲🇽Spain / Mexico00 1 618 555 0123
🇦🇺Australia0011 1 618 555 0123
🇯🇵Japan010 1 618 555 0123
HAVE THE FULL NUMBER?

Learn more about that number.

Check the line type and the carrier the number block was originally assigned to.

10 digits to see the carrier and line type of the number

05 / CARRIERS

Carriers in area code 618

Share of the number blocks by carrier and line type.

Landline

Frontier Communications
30%
AT&T
23%
Lumen Technologies
9%
Sinch
5%
Bandwidth
4%
Others
29%

Mobile

AT&T Mobility
43%
Verizon Wireless
27%
T-MOBILE USA
18%
Boost Mobile
5%
USA Mobility
4%
Others
3%

Carrier shown is the original assignment of each number block and may differ today because of number portability.

06 / PREFIXES

Complete list of prefixes for area code 618

786 number blocks (NXX) assigned in this area code.

PrefixTypeCityCarrier
(618) 200 Mobile Benton Verizon WirelessCELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
(618) 201 Mobile Carbondale Verizon WirelessCELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
(618) 202 Mobile Anna AT&T MobilityNEW CINGULAR WIRELESS PCS, LLC - IL
(618) 203 Mobile Carbondale T-MOBILE USAT-MOBILE USA, INC.
(618) 204 Mobile Mount Vernon T-MOBILE USAT-MOBILE USA, INC.
(618) 205 Landline Glen Carbon Windstream CommunicationsPAETEC ITEL, LLC
(618) 206 Landline O'Fallon Windstream CommunicationsPAETEC ITEL, LLC
(618) 207 Landline Belleville-Adams Lumen TechnologiesLEVEL 3 COMMUNICATIONS, LLC - IL
(618) 208 Landline Alton Windstream CommunicationsPAETEC ITEL, LLC
(618) 209 Landline Golconda TelnyxTELNYX LLC

Showing 10 of 786 prefixes

07 / FAQ

Frequently asked questions about area code 618

Where is area code 618 used?
Area code 618 serves Collinsville and the surrounding area in Illinois, including Madison County, St. Clair County, Jackson County, Williamson County, Marion County.
What city is area code 618 from?
The main city of area code 618 is Collinsville, IL.
What time zone is area code 618 in?
Area code 618 is in the Central Time (CT) time zone (America/Chicago).
Is 618 an overlay area code?
Yes. It shares its territory with 730. In an overlay, every call requires dialing all 10 digits.
How do I call a number with area code 618 from the United States?
Dial the 10 digits: 618 + 7-digit number. For some long-distance calls from a landline you may need to add a 1 first.
How do I call a 618 number from another country?
Dial your country's exit code (or +), then 1, then 618 and the seven-digit number. From a mobile you can use +1 618 XXX XXXX.
Which carriers use area code 618?
Most landline blocks belong to Frontier Communications and most mobile blocks to AT&T Mobility. The carrier shown is the original assignment and may differ today because of number portability.
Is area code 618 for landlines, mobiles or both?
Both. About 71.25% of the number blocks are landline, 28.75% mobile.
How do I save a 618 number in WhatsApp or my phone?
Save it in international format: +1 618 XXX XXXX. That way WhatsApp, iMessage and Telegram recognize it from any country.
Is it safe to answer calls from area code 618?
The area code only shows the region a number was assigned to; it does not tell you who is calling. Scammers can fake any area code, so do not share personal or banking information with unknown callers, and let unknown numbers go to voicemail.
KEEP EXPLORING

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Other area codes in Illinois

217 · Springfield224 · Arlington Heights309 · Peoria312 · Chicago331 · Aurora447 · Danville464 · Tinley Park630 · La Grange708 · La Grange730 · Centralia773 · Chicago779 · Rockford815 · Rockford847 · Northbrook872 · Chicago

View all Illinois area codes →