> As I understand:
>
> IPv4 /24 is (Total IPv4)/(2^24)
> IPv6 /24 is (Total IPv6)/(2^24)
>
> Or not ?

Sort of - that's the right math for the total number of addresses, but not the right math for what _proportion_ of the IP space it represents, which was the original question.

The /24 is from the _left_ hand (or most significant) bit, not the right hand.

Hence a /24 is always 1:16777216 of the IP space.

Ray