618 Area Code

The 618 area code is a historic telephone code in the North American Numbering Plan (NANP), serving the southern region of Illinois, USA. Introduced in 1947 as one of the original NANP codes, it is one of the few area codes that still covers a large geographic region without being split. In 2023, the 730 area code was added as an overlay to accommodate growing demand.

Understanding the 618 Area Code

The 618 area code covers southern Illinois, including cities along the Mississippi River and areas near the St. Louis metropolitan region. It is well known for its mix of urban and rural communities, historic towns, and proximity to major landmarks such as the Shawnee National Forest.

618 Area Code Map and Location

The 618 area code map shows coverage across southern Illinois, extending from the St. Louis suburbs to the Ohio River along the state�s southern border.

Major Cities and Regions in the 618 Area Code

  • East St. Louis
  • Carbondale - home to Southern Illinois University
  • Edwardsville
  • Belleville
  • Granite City
  • Cairo
  • Alton

ZIP Codes Covered by the 618 Area Code

Some key ZIP codes within the 618 area code include:

  • 62220 - Belleville, IL
  • 62025 - Edwardsville, IL
  • 62040 - Granite City, IL
  • 62901 - Carbondale, IL
  • 62960 - Metropolis, IL

Time Zone

The 618 area code is located in the Central Time Zone (CT):

  • Standard Time: UTC -6
  • Daylight Saving Time: UTC -5

Dialing, Phone & Service Details

  • Overlay Codes: 730 (added in 2023)
  • Local dialing: 10-digit dialing required due to overlay
  • Long-distance within the USA: Dial 1 + 618 + 7-digit number
  • International calls: Dial exit code + 1 + 618 + number
  • Services: Landline, mobile, VoIP, and business communications

What area code is 618? / Where's area code 618?

What area code is 618? � The 618 area code is a telephone code serving southern Illinois.

Where's area code 618? � It is located in Illinois, USA, covering East St. Louis, Carbondale, Edwardsville, Belleville, Granite City, Alton, and Cairo in the Central Time Zone.

Frequently Asked Questions (FAQ) about 618 Area Code

What is the 618 area code?

The 618 area code is a southern Illinois telephone area code that has been active since 1947.

When was the 618 area code created?

The 618 area code was created in 1947 as part of the original NANP design.

Where is area code 618 located?

It serves southern Illinois, including East St. Louis, Carbondale, Edwardsville, and Belleville.

Does 618 have an overlay?

Yes, the 730 area code was introduced in 2023 as an overlay.

What time zone is 618 in?

The 618 area code is in the Central Time Zone (CT).

618 Area Code