State
Illinois
Major City
Chicago
Time Zone
America/Chicago
Current Time
2:43 PM
312 Area Code
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Area Code info
Where is Area Code 312?
The 312 area code is located in the state of Illinois . 312 is one of the 357 three-digit telephone area codes in the USA. It covers roughly 1,052,188 unique phone numbers and 12,582,032 individuals near the city of Chicago in our database.
Cities in the 312 Area Code
The most populous cities in area code 312 are
Chicago
2.7MCicero
81.9kSchaumburg
78.3kGlenview
48.2k Other cities in area code 312 include
Buffalo Grove
Wheeling
Northbrook
Roselle
Brookfield
Deerfield
Hinsdale
Prospect Heights
Western Springs
La Grange Park
Clarendon Hills
312 Area Code Time Zone
This time zone is known as the Central Standard Time (CST). The current time in this time zone is 2:43 PM on Apr 30, 2025.
In Service Date: 1947
312 Area Code Demographics
Statistics based on US Census data for the 312 area code
39.1
Median Age
$76.7k
Median Income
$251.6k
Median Home Value
12.6M
Total People
Nearby Area Codes
Phone Numbers
1,171,460
State
Illinois
Major City
Springfield
Phone Numbers
263,428
State
Illinois
Major City
Elgin
Phone Numbers
972,896
State
Illinois
Major City
Peoria
Phone Numbers
28,770
State
Illinois
Major City
Aurora
Phone Numbers
1,004
State
Illinois
Major City
Phone Numbers
1,627
State
Illinois
Major City
Phone Numbers
1,273,610
State
Illinois
Major City
Belleville
Phone Numbers
1,842,716
State
Illinois
Major City
Aurora
Reverse Phone Lookup 312-XXX-XXXX
Find out who the 312 phone number is registered under. Our free reverse phone lookup allows you to search records associated with a landline or cell phone number to help quickly identify who’s calling or texting you.
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Browse Phone Number Prefixes in the 312 Area Code
Landlines
749Wireless Prefixes
49Carriers
39Countries
3ZIP Codes
39