United States Country Code

To make an international call to Chicago, you need to dial the United States country code. This ensures that your call will be properly routed to United States from your originating country.

Country codes are also referred to as ISDs or international subscriber dialing codes.

If you are calling another country other than the USA, you can lookup the country code / ISD below.

USA country code / ISD: +1

Lookup a Country Code

To find the country code or ISD for your destination country, please lookup the code here.

Find Country Code / ISD
Destination country
Your Country Code
Country code will print here


  • Countries marked with an ' * ' are part of the North American Numbering Plan (NANP). What is shown is the standard +1 country code shared by all NANP members followed by a unique 3-digit regional area code.
  • When dialing, dial only the digits shown. Do not dial any of the other characters.

Back to top

International dialing codes
for selected countries
Chicago dialing procedure

To find other dialing code information, follow these links:

Related Pages

Sorry, no related content.

Back to top