Where is area code 40?

Area code question: Where is area code 40? We did not find anywhere in North America where area code 40 is used.

If you know that 40 area code is used somewhere, please contact us so we can update our database accordingly.

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Where is area code 41?
Now you know that area code 40 is not currently in use. Go here to check the next area code on our list.

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