Calculate IP address ranges, subnet details, and CIDR notation. Convert between IP ranges and CIDR blocks.
IP/prefix format like 192.168.1.0/24 where /24 means first 24 bits are the network portion.
Usable hosts = 2^(32-prefix) - 2, subtracting network and broadcast addresses.
Inverse of subnet mask, used in ACLs. For /24 (255.255.255.0) its 0.0.0.255.