php - How to know the original country of a website? -

I want to know the basic country of a website. I have seen that Alexa website can often detect the country of the country's native. For example, Alexa can find out that the original country of the stackoverflow.com website is USA, and so on. How do Alexa? And how can I do this? Thank you ..

You can always read the country of any website of data from Alexa

main data from XML

full data

this more Be reliable and easier than any other self-developed approach