I've noticed recently, as of today, that all the websites I visit (except for a specific few sites such as Google) are all put into a frame. I'm not sure what the reason for this is, there are no ads displayed and everything appears normal. The only reason I found out is because the headers weren't loading correctly and none of the page titles showed up properly - I quickly checked the source code and saw that instead of the source of the page I was expecting to see, there was a single line with a frame.

I first thought maybe somekind of trojan, but after going through various checks I've determined it's my ISP and/or somekind of Internet Registry (I traced the IP shown in the source code)

What can be done to prevent this frame, short of using a VPN? I feel like I am being spied on.

PS: I'm located in South Korea.