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. Get your own business phone numbers with many smart features. Business Phone Numbers is easy with TollFreeForwarding.com.

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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. Increase sales with virtual phone systems and manage many smart features online. Virtual Phone free for virtual-phone-systemsvirtual phone systems days, with TollFreeForwarding.com.

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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.

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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.

312 Area Code

AreaCode.org is an area code finder with detailed information on the 312 area code including 312 area code map.

Major cities like Chicago within area code 312 are also listed on this page. More area codes, including those outside of Illinois, are found on the AreaCode.org homepage.

Some telephone area codes are overlaid, requiring 10-digit dialing. AreaCode.org is your one-stop site for area code lookup, area code search, and area code locator.

312 serves the Chicago Loop of the city of Chicago, Illinois. It encompasses only a few square miles, roughly bounded by North Avenue to the north, Ashland Avenue to the west, Lake Michigan on the east, and 31st Street on the south.