Computes IPv4 subnet details—mask, network address, broadcast address, usable host range, and address count—from an IP address and prefix length.
Show the network address, broadcast address, and first and last usable host addresses.
CIDR prefix length is the number of leading network bits in the subnet mask, such as /24.
IP Group Address Range
A valid subnet mask has contiguous 1 bits followed by contiguous 0 bits; non-contiguous masks are invalid for CIDR.
224.0.0.0 - 224.0.0.255 Prominent multicast address, control channel
224.0.1.0 - 238.255.255.255 Global (Internet wide) group addresses
239.0.0.0 - 239.255.255.255 Local overcast address