I did a quick check and found it can't be trusted 100%. It listed the trim on my Ranger as "Edge Plus SuperCab 4WD - 377A". It also listed the place of manufacture as "United Sates". The other information was obvious.
So, if you want to know if your Ranger is a Ford, this is a helpful tool but it may not to give you the specific plant that manufactured it and the trim level may not be correct. I guess you can't expect a lot from something that is free.