Question 1

What is the area code for Chicago?

Accepted Answer

The main area code for Chicago, Illinois is 312. Chicago is now served by 3 area codes in total: 312, 773, 872.

Question 2

How many area codes does Chicago have?

Accepted Answer

Chicago has 3 area codes: 312, 773, 872.

Question 3

Why does Chicago have more than one area code?

Accepted Answer

As Chicago used up the numbers available in its original area code (312, in service since 1947), additional "overlay" codes were added over the same area so new phone numbers could keep being assigned.

Question 4

How do you dial a Chicago number?

Accepted Answer

Dial all 10 digits — the area code (312 or 773 or 872) followed by the 7-digit local number. From abroad, dial +1, then the area code and number.

Area codes in Chicago, Illinois

Area codes serving Chicago

Nearby cities