312 Area Code
Chicago, IL · United States
Country code +1 · ISO US
Example 312 Number
A sample number from this area code, formatted three ways.
| National | International | E.164 |
|---|---|---|
| (312) 555-0123 | +1 312-555-0123 | +13125550123 |
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Pre-filled with a 312 sample number. Edit it and click "Try It" to see the parsed result.
Cities and Regions
Locations served by the 312 area code, according to Google's libphonenumber.
- · Chicago, IL
How to Dial United States Numbers
From abroad
Dial +1 followed by the national number, dropping any leading 1.
Within United States
Dial 1 before the local number to make a domestic call.
Dialing out of United States
Dial 011 followed by the destination country code and number.
Nearby United States Area Codes
Frequently Asked Questions
Where is the 312 area code?
└ The 312 area code covers Chicago, IL in United States.
What timezone is the 312 area code in?
└ Numbers in the 312 area code are in the America/Chicago timezone.
How do I dial a 312 number?
└ From abroad, dial +1 312 followed by the local number. Within United States, dial 1312 before the local number.