Chicago Dialing Codes - At a Glance

Below is a recap of the key Chicago dialing codes you may need for making calls to, from, or within Chicago.

Follow links for additional information on any code - or to look up that code for other countries.

National long distance code (NDD):
312, 773, 872, 708, more...

Chicago phone numbers are 10-digits long consisting of a 3-digit area code and a 7-digit local subscriber number. The phone number format is the same for both landline and mobile phones.

Additional Chicago dialing and calling information is provided throughout this site.

Chicago dialing instructions
Chicago phone numbers
Recommended calling cards

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