I just tried, and yes, it is important to match the correct host with the ip address. The server uses the Host HTTP header to find the right virtual host and se

I just tried, and yes, it is important to match the correct host with the ip address. The server uses the Host HTTP header to find the right virtual host and send the right SSL certificate. A wrong match seems to break the site. But your assumption is right, I believe all these hosts are otherwise identical mirrors of Sci-Hub.