TIL India has almost 1 billion internet subscribers. And the tip five ISPs serve very nearly all of them (98%). So it's very interesting to look at how ISPs do DNS filtering:

• A total of 43,083 unique apex domains were confirmed blocked via DNS filtering
  — a sixfold increase over the previous largest study (which documented 6,787
  blocked domains).
• A major ISP’s misconfiguration of a blocking rule is causing significant overblocking
  where an entire global top-level domain (.yokohama) is inaccessible.
• Only 9,363 censored domains (21.73% of the blocklist produced by this study)
  had ranks in the Tranco list (a reliable and transparent top-sites ranking list),
  demonstrating that test lists drawing from popularity rankings do not accurately
  represent censorship scale.
• There is aggressive blocking of services and platforms across categories including
  business, hosting, research, and communication.
• A state-owned, public-sector undertaking (PSU) ISP’s consumer blocklist is
  hypothesized to be derived from filtering policies intended for government offices.

Apparently, the movie industry has a very effective lobby: