What area code is 312 in Illinois?

Illinois regions with area code 312

Currently the area code 312 in the state of Illinois is used by 1 locations:

• Chicago

Is the 312 prefix always used in these locations?

These Illinois locations always use this prefix, however, it may happen that some locations have multiple area codes.

As a general rule, smartphones automatically indicate the location when they receive a call. For example, if you receive a call with area code 312, the phone will indicate that it is a call coming from the state of Illinois.

How do I call from abroad to a phone in a location with the 312 area code?

To call a phone to one of the locations listed above, you must dial the USA country code (+1), the dialing code 312, and the local phone number you wish to call:

+1 312 [Telephone number]

It should be remembered that making calls from abroad to a phone with a Illinois area code will  cost more than making calls within the same country. The final cost of the international call will be defined by the telephone company with which the call is made.