[nsomaru]

I've found non-https archive.org (!) to be blocked in India on a government ISP.

Interestingly it seems to depend on the ISP used. Same site worked fine on a mobile connection.

[nitin_flanker]

Yes, as far as I've tried, it entirely is ISP dependent. Here's the message that my ISP show when a website is blocked: http://ibb.co/mvSMRR. I can access it however using my Wifi instead. Similarly, few website that are blocked by one are accessible on others carriers.