They buy them;
Just as Amazon (and other big ones) do.
Have you ever compared the prices of these VPS to IPv6-only VPS and wondered why IPv6-only ones are so much cheaper?
By definition there are only ~4 billion IPv4 addresses available. No matter how fair you distribute them; that is simply not sufficient for todays -let alone future- demand.
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The client can always select to use “server -4 *.pool.ntp.org” to get IPv4 only, or “server -6 *.pool.ntp.org” to get IPv6 only. There is no need to break the geographical structure by adding a special IPv6 subdomain.
True, but still i’m looking forward to have ipv6 enabled across the board, instead of relying on client config (which might not always be possible on some very simple IoT clients).
I suspect i might have to reduce the server bandwidth setting when a flood of ipv4 clients will be routed to my ipv6 servers 