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Browse Phone Numbers in Illinois

Find phone numbers, prefixes, and area codes across Illinois. Use this directory to explore listings by city or code, identify the carrier or location behind any number, and check if it’s been reported for spam or fraud.

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Illinois Map

State Introduction


Illinois is a state located in the Midwestern United States. It is the sixth most populous state in the country and the 25th largest state in terms of land area.

Illinois is bordered by Wisconsin to the north, Iowa to the west, Missouri to the south, and Indiana to the east. The state capital is Springfield, and the largest city is Chicago.

Illinois Area Codes History

Illinois currently utilizes 17 area codes. When first established by AT&T and the Bell System in 1947, 217 covered central Illinois, 312 covered the Chicago metropolitan area, 618 covered southern Illinois including East St. Louis and Carbondale, and 815 covered northern Illinois except Chicago and Quad Cities. The most recently added was 730 in 2023 as an overlay to 618. Today, 815 is the most populated with an estimated 1.8 million of the state's 12.8 million residents.

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Illinois Overview

57,916 Sq. Mi.

Total Area

1,235 Ft

Highest Elevation

279

Lowest Elevation

12,757,634

Total Population

49.48%

Male Population

50.52%

Female Population

Chicago

Largest City

2.5

Avg. Household Size

$43,198

Per Capita Income

6,698,657

Labour Force

65.2%

Labour Force %

6.0%

Unemployment Rate

Common Statictics

Population Diversity

Illinois

65.7% of the community is White / Caucasian race. Most of people are live near the urban areas according to the given data. These visualised population data related the total number of population of the given state.

Age Distribution

Illinois

Around 1699 thousand people are in-between 15-24 years old. 40% of the people are in the working force age range. Average age of residents is 40 years. These visualised population data related the total number of population of the given state.