Re: "Where does the 4 to 6 interchange take place?"
https://www.anonymousspeech.com/ had no problem adding DNS records for the single IPv6 address my server company handed to me. https://freedns.afraid.org/ already had infrastructure in place for doing the same for the freebies I use for other peoples freebie web sites on my server. My home ISP reminded me that they had handed me several GAZEEEELION IPv6 addresses, and would be happy to let me setup my own DNS servers, then delegate to me. Something I was thinking about doing anyway, for other reasons. No extra charge from any of them.
"They need a series of clue-by-fours"
I think you mean clue-by-sixes.
Biting the hand that feeds IT
