Quoting tito via Dng (dng@???):

> Hi,
> can this opennic.cache file be downloaded freely or do you need
> to register?

As mentioned, I have not experimented with alternative DNS roots in decades.

I could try to answer your question for you, but, seriously, if you are
going to start experimenting with advanced DNS topics, you really need
to be prepared to do basic data-discovery for yourself at _bare_
minimum. If you are not, I would advise staying away from such matters.

I am _not_ prepared to spoon-feed novices on such topics.