How to Call Chicago, Illinois

Chicago Dialing Codes

To make an international phone call to Chicago, IL, the following dialing codes will be required.

US phone numbers are highly standardized and are always 10-digits long. They are almost universally written to include all 10-digits. This makes dialing US numbers a bit easier than in some countries.

Phone Number Format for International Calls

To make an international phone call to Chicago, you generally will need to dial a phone number formatted as follows:

International Phone Number Format
to Call Chicago, IL

idd	1	aaa	nnn nnnn
international access code	country code	area code	local subscriber number

Taking this general format, you need to plug in the outbound international access code for your originating country and the complete 10-digit phone number in Chicago.

In the United States, landline numbers and cell phone numbers have identical 10-digit formats.

More information:

• Lookup international access code
• Chicago area codes
• Chicago phone directories

If you receive calls from unkown phone numbers, why not check them online at a phone directory? For a trusted reverse phone lookup service, you can visit RetroSleuth.com and simply enter the mystery phone number.

More on int'l phone numbers >>>>>

Landline vs. Mobile Phone Number Formats

In Chicago and throughout the United States, landline phones and mobile phones have identical phone number formats. Both types of phone numbers are 10-digits long, including a 3-digit area code and a 7-digit subscriber number.

The complete international phone numbers you should use to reach the two types of phones are shown below.

More on landline vs. mobile dialing >>>>>

Call Chicago from Selected Countries

For dialing information on calling Chicago from specific countries, please follow the country links below. On these pages, you will find country-specific dialing codes, phone number formats, and step-by-step dialing instructions for calling Chicago, IL from your country.

If your country is not listed, please follow the Chicago dialing procedure.

Additional countries >>>>>

Call Chicago from Any Country

To make an international call to Chicago, IL, USA, you first need to dial the international access code (aka 'IDD') for your originating country. You can lookup the international access code for your country in the widget below.

Insert your IDD at the maroon x's below to create a complete international phone number for dialing Chicago.

• Phone number format to call a Chicago landline number:
  'idd 1 aaa nnn nnnn '
• Phone number format to call a Chicago mobile number:
  'idd 1 aaa nnn nnnn '

Notes:

• Some countries, e.g., Australia, France, Singapore, use more than one IDD to designate specific carriers, specific countries, or other purposes. Be sure to use the correct code for your carrier or calling plan.
• A '~' symbol indicates a dialing pause. Dial any numbers before the '~', then wait for tone before continuing to dial.
• Dial only the numerical digits shown - any other characters are informational only.

Chicago Dialing Codes

To make an international phone call to Chicago, IL, the following dialing codes will be required.

US phone numbers are highly standardized and are always 10-digits long. They are almost universally written to include all 10-digits. This makes dialing US numbers a bit easier than in some countries.

Phone Number Format for International Calls

To make an international phone call to Chicago, you generally will need to dial a phone number formatted as follows:

International Phone Number Format
to Call Chicago, IL

idd	1	aaa	nnn nnnn
international access code	country code	area code	local subscriber number

Taking this general format, you need to plug in the outbound international access code for your originating country and the complete 10-digit phone number in Chicago.

In the United States, landline numbers and cell phone numbers have identical 10-digit formats.

More information:

• Lookup international access code
• Chicago area codes
• Chicago phone directories

More on int'l phone numbers >>>>>

Landline vs. Mobile Phone Number Formats

In Chicago and throughout the United States, landline phones and mobile phones have identical phone number formats. Both types of phone numbers are 10-digits long, including a 3-digit area code and a 7-digit subscriber number.

The complete international phone numbers you should use to reach the two types of phones are shown below.

More on landline vs. mobile dialing >>>>>

Call Chicago from Selected Countries

For dialing information on calling Chicago from specific countries, please follow the country links below. On these pages, you will find country-specific dialing codes, phone number formats, and step-by-step dialing instructions for calling Chicago, IL from your country.

If your country is not listed, please follow the Chicago dialing procedure.

Additional countries >>>>>

Call Chicago from Any Country

To make an international call to Chicago, IL, USA, you first need to dial the international access code (aka 'IDD') for your originating country. You can lookup the international access code for your country in the widget below.

Insert your IDD at the maroon x's below to create a complete international phone number for dialing Chicago.

• Phone number format to call a Chicago landline number:
  'idd 1 aaa nnn nnnn '
• Phone number format to call a Chicago mobile number:
  'idd 1 aaa nnn nnnn '

Notes:

• Some countries, e.g., Australia, France, Singapore, use more than one IDD to designate specific carriers, specific countries, or other purposes. Be sure to use the correct code for your carrier or calling plan.
• A '~' symbol indicates a dialing pause. Dial any numbers before the '~', then wait for tone before continuing to dial.
• Dial only the numerical digits shown - any other characters are informational only.