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Phone Numbers in Area Code 312

Area code 312 serves the Chicago Bay Area in Illinois, covering cities like Chicago and Roselle. Use this directory to search prefixes, identify carriers, and check if numbers in the 312 area have been reported as spam or fraud.

View Area Code

Area Code 312 Map

Area Code Introduction


Area code 312 is located in the North American Numbering Plan (NANP) and covers the city of Chicago, Illinois. It is one of the original area codes created in 1947 and is the only area code that serves the city of Chicago.

Chicago

Roselle

Area code 312 is a major economic center in the Midwest. It is home to many of the city's major corporations, including Boeing, McDonald's, and United Airlines. It is also home to the Chicago Board of Trade, one of the world's largest futures exchanges.

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Area Code 312 Overview


1,610,981

Total Population

48.7%

Male Population

51.3%

Female Population

$65,563

Per Capita Income

2.3

Avg. Household Size

914,572

Labour Force

68.9%

Labour Force %

6.9%

Unemployment Rate


Prefixes in Area Code 312

696 Entries Found

Prefixes

Carrier Name

Action

(312) 201

Ameritech Illinois

(312) 202

Ameritech Illinois

(312) 203

New Cingular Wireless PCS

(312) 204

Ameritech Illinois

(312) 205

Allegiance Telecom

(312) 206

New Cingular Wireless PCS

(312) 207

Ameritech Illinois

(312) 208

New Cingular Wireless PCS

(312) 209

Cellco Partnership DBA Verizon Wireless

(312) 212

Ameritech Illinois

(312) 213

New Cingular Wireless PCS

(312) 214

Ameritech Illinois

(312) 215

New Cingular Wireless PCS

(312) 216

First Communications LLC

(312) 217

United States Cellular Corp. - Illinois

(312) 218

New Cingular Wireless PCS

(312) 219

Bandwidth.com Clec

(312) 220

Ameritech Illinois

(312) 221

Sprint Spectrum

(312) 222

Ameritech Illinois

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Recently Reported


(312) 112 - 2333

Who owns this number?

(312) 270 - 1784

Anyone knows who this is?

(312) 312 - 7030

silent call, hung up after 10 seconds.

(312) 487 - 3820

Seems to be a sales call from Cannon.

(312) 500 - 5898

I didn't answer. No message.

(312) 555 - 7782

Trying to find out who owns this number.

(312) 567 - 2000

We received a call from this number yesterday.

(312) 580 - 3859

Caller ID said ATT. Did not answer and no message was left.

(312) 598 - 5295

The caller left no voice message.

(312) 645 - 8251

Received a call on landline.

(312) 724 - 5224

Received a call from this number while was talking on other line.

got calls

Did you receive any dangerous, unwanted or spam call?