Sadly, depending on the ISP, the prefix is not necessarily static and may change on reconnect (for example, Deutsche Telekom will only keep the prefix static for business accounts). This is completely arbitrary and makes relying on GUAs for internal addresses problematic.
It’s too bad that we are inheriting the static IP policies from IPv4, because ISPs want to upsell.
It’s too bad that we are inheriting the static IP policies from IPv4, because ISPs want to upsell.