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international dialing information
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Chicago Dialing InstructionsTo make an international telephone call to Chicago, IL from any country worldwide, please follow the dialing procedure shown below. ![]() The United States has highly standardized phones numbers, so the dialing steps are the same whether you are dialing a Chicago landline phone or a Chicago mobile phone To dial a Chicago phone number, you will need: Your dialing procedure may be affected if you are calling Chicago using a calling card or VoIP phone service. Follow links for more additional information for dialing. Click here for dialing steps by country. Procedure to Dial Chicago, IL from Any CountryFollow this basic dialing procedure to place an international long-distance call from any country worldwide to a landline or mobile phone number in Chicago, IL. The procedure outlined below is for direct international dialing from a landline or mobile phone in the home or office. Additional or different dialing steps may be required when calling Chicago using calling card or VoIP service. 1. Dial international access code / IDD: iddDial your country's international access code (aka international direct dial code or IDD) to initiate a phone call to Chicago. Lookup your international access code here. Note that some mobile operators do not require dialing an IDD and/or allow use of substitute characters (such as '+') in lieu of dialing an IDD. As well, in many cases you don't dial an IDD when using a calling card or VoIP service. 2. Dial United States country code: + 1Dial country code +1 to reach any location in United States, including Chicago. Country codes are also known as ISDs or international subscriber dialing codes. If your Chicago phone number starts with a ' 1 ' - e.g., 1 312 224 1800, don't add a second ' 1 '. Dial just a single ' 1 ' after the international access code. 3. Dial a 10-digit Chicago phone numberAll Chicago phone numbers are 10-digits long with two parts: a. Dial a 3-digit Chicago area code: aaa b. Dial a 7-digit local subscriber number: nnn nnnn Some common Chicago area codes are: 312 , 773 , 872 , and 708 . List of Chicago area codes Lookup a Chicago phone numberSteps to Dial Chicago from a Specific CountryFollow the links below for country-specific dialing instructions for calling Chicago landline and mobile phones. These pages include originating country access codes and other information. Dialing Tips
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