In my limited understanding I believe that ipv6 blocks are given out to organisations such as your local ISP which let's you know the location because you can s

In my limited understanding I believe that ipv6 blocks are given out to organisations such as your local ISP which let's you know the location because you can see who owns the block. I don't think limited addresses was ever the reason for assigning in blocks but the real reason is it makes routing easier. Instead of having every router know the path to 128² addresses it only needs to know that everything starting with these few bytes goes to this port which saves memory on routers.