312 Area Code 312
At AreaCode.org, you'll find helpful information on the 312 area code, including 312 area code location. Other phone area codes may be found using AreaCode.org's area code locator. Use the search function for area code look up.
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AreaCode.org is an area code directory with helpful information on the various United States area codes, area code listing, and other area code phone details. AreaCode.org also list international area codes within the North American Numbering Plan.
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Area Code Finder
Find area codes by using AreaCode.org's area code finder. AreaCode.org provides an area codes map of area codes United States. Area zip codes are different than area codes for calling.
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Area Code Lookup
AreaCode.org is an excellent resource for area code lookup and area codes phone information. Here you'll find an area codes list of area codes within the United States, plus Canada area codes.
Area Code Map
For a full list of area codes, visit AreaCode.org. It provides USA area codes and an area code map. Mexico area code is not included in the North American Numbering Plan.
Telephone Area Codes
AreaCode.org is a resource of North American telephone area codes. Beyond area code listings, relevant information about each area code is detailed. You can also search area codes by state, and within the NANP, find country area codes.
Area Codes Locator
The area codes locator shows the coverage area for each phone number area code. Area code locations are also listed by city next to the area code maps on this page.
Area Code Search
Find area codes using the area code search function on AreaCode.org. With area codes search, you can find city area codes in the United States, Canada and elsewhere.
Area Code Location
AreaCode.org shows you the area code location covered by each area code; for example, the LA area code coverage area in Los Angeles. State area codes may be found using AreaCode.org, but Mexico area codes are not included.
Telephone Area Code
The telephone area code is dialed before the local number. For area codes by city, search AreaCode.org. Area codes telephone differ from region to region, and in some places the area code must be dialed even when calling locally within that region. Find out more with area code decoder.
Not looking for Chicago 312 area code information? We also have Cicero 708 area code information for the 708 Area Code and Chicago 773 area code information for the 773 Area Code.