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Area Codes for Chicago, IllinoisApproximately 9 area codes are in use in the City of Chicago and nearby areas, including 312 and 773 , among others. Another handful of area codes is in use across other parts of the state of Illinois. In Chicago, area codes are always included in written telephone numbers and area codes must be dialed for all calls, even for local calling. All US phone numbers are 10-digits total, including a 3-digit area code and a 7-digit local subscriber number. Chicago area code information: Chicago area codes:
312, 773, 872, 708
more... Area codes are used to route phone calls to a specific geographic area within a country. All area codes in the United States are exactly 3-digits long. In the past, a given region often had just one area code. Nowadays, many cities and towns in denser urban areas, including Chicago, have 2 or more area codes. To make an inbound international call (or domestic long distance call) to a Chicago landline or mobile phone, you need to dial the appropriate 3-digit area code, followed by a 7-digit local subscriber number. If you don't have a fully specified 10-digit phone number, including area code, you will not be able to complete an inbound call. Lookup Chicago phone numbersArea Codes Used In & Near Chicago, IllinoisThere are currently 9 area codes used, or planned for use, in the Chicago metropolitan. Several of these area codes are relatively recent 'overlay' area codes that were added to provide additional phone number capacity. Another handful of area codes are used across the rest of the state. Here are the area codes in use for metro Chicago Chicago Area Codes
Notes:
To accommodate demand for new phone numbers, Illinois uses 'overlay' area codes - meaning that as new phone numbers are needed, a new area code is added within the footprint of an existing area code(s). For instance, the area code 630 was added several years ago within the footprint of the 331 area code. See maps and other area code listings below for further information. Area Codes the Largest Illinois TownsHere are the area codes for the 25 largest cities and towns in Illinois (in alpha order).
Chicago, Illinois Area Code MapsThe following maps show area codes for Chicago and the state of Illinois. Maps may not be completely up to date. City Codes vs. Area CodesIn some cases, area codes may be referred to as city codes. However, a 'city code' more correctly refers to the codes used to designate airports and other geographic locations. These codes are issued under the United Nation's UN/LOCODE system and/or the IATA airport coding system. The city code for Chicago is CHI. Other Area Code Information
Chicago online telephone directoriesChicago dialing stepstags: Related PagesSorry, no related content.
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