There is this site un**-us.com which supposedly allows you to bypass ISP rules such as content restriction on a particular area. Now , it is well known that routing your traffic through a web proxy yields the same result. But, here this site uses DNS server to unblock you. I do not understand how that is possible. How can having a different DNS server exhibit the same behavior of that of a proxy IP ?
Some very short sighted content-filtering systems rely upon DNS. The advantage is that its very cheap to build such a content-filtering service, and consumers are ignorant to the benefit of such a system.
Clearly this is easy to bypass, 18.104.22.168 and 22.214.171.124 are both DNS servers that will provide a uncensored resolution.