Illinois · Area code
Area Code 312Chicago, IL
Area code 312 is in Illinois, United States. Its time zone is Central Time.
Area code 312 at a glance
- Area code
- 312
- Main place
- Chicago, IL
- State
- Illinois
- Country
- 🇺🇸 United States
- Country calling code
- +1
- Time zone
- Central Time (America/Chicago)
- Dial from abroad
- +1 312 XXX XXXX
- Dial inside the US and Canada
- 1 312 XXX XXXX
Look up a 312 number
Enter a full number with area code 312: it shows the line type, place, network and time zone, and every way to write it. Free and private.
Area code 312: frequently asked questions
Where is area code 312?
Area code 312 is in Illinois, United States. It serves places including Chicago.
What time zone is area code 312 in?
Area code 312 is on Central Time. A number with this area code can belong to someone living anywhere, so the time zone tells you where the number was issued rather than where the person is.
Which country is area code 312 in?
Area code 312 belongs to the United States, part of the North American Numbering Plan. Country code +1 is shared by the United States, Canada and many Caribbean and Pacific countries; the area code decides which one a number is in.
How do I call a 312 number from another country?
Dial your country's international access code (or press + on a mobile phone), then 1, then 312, then the seven-digit number: +1 312 followed by the number. Inside the United States and Canada, dial 1 and the ten digits.
Can I tell who is calling from an area code?
No. The area code only shows where a number was first issued. People keep their numbers when they move, mobile numbers work anywhere, and callers can disguise the number they call from. To see what the numbering plan says about a specific number, use the free phone number lookup.
What other area codes are in Illinois?
Other area codes in Illinois include 217, 224, 309, 331, 447, 464, 618, 630, 708 and 730.