Work out IPv4/IPv6 blocks: mask, host range, subnetting.
Everything about one block: mask, host range, binary form, reverse name.
IPv4 and IPv6 both work. You may append /24 here.
Accepts a bit count (24), a netmask (255.255.255.0) or a wildcard (0.0.0.255).
Leave empty to skip. Only the first 32 blocks are listed.
One per line as "name, hosts". To pin a length write "name, /64", the right way for IPv6.
One block per line. Adjacent blocks merge too, not just overlapping ones.
One block per line. Blocks outside the parent are ignored; blocks that overhang lose only the part inside.
64 addresses per page. Leave 0 to start at the first host.
Enter an address and prefix length, then press Calculate.
