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> Bonus points if someone builds a way to crowd source the data so that it gets logged from multiple DNS servers round the world.

What you want is a website that answers: Does Country-C block Website-W? A user gives it a URL and it has VPNs surfacing in lots of different countries and it tries them all, and displays in which countries the URL is blocked.

The website also stores and records all blocked/unblocked websites, and allows this data to be downloaded.




There is something like that for the great wall of china: http://www.greatfirewallofchina.org/


Yes. Although that site keeps no history, doesn't allow you to download a list of blocked sites, and only works for China.

And it bizarrely replaces its headers with Flash.




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