Perhaps this has been a posted before, but I had not seen it until today. From “Travel Weekly.” I checked a few versus official government sites and it seems to be accurate.
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Eastern Iowa, USA
8047 posts
That version may be a little more user friendly, another resource is the IATA Travel Centre https://www.iatatravelcentre.com I have found it accurate as well, and is updated almost daily. Some airlines use this site as their source for document verification.