Show network, broadcast, first and last given network address
The "bit format" in the netmask is also called the CIDR format (CIDR = Classless Inter-Domain Routing).
IP multicast address range
All multicast addresses can be easily recognized because the parity pattern starts with "1110".
224.0.0.0 - 224.0.0.255 Well-known multicast addresses, control channels
224.0.1.0 - 238.255.255.255 Global (Internet wide) multicast addresses
239.0.0.0 - 239.255.255.255 local multicast address
LAN planning tool, subnet calculation and division, conversion of subnet masks in various bases, and conversion of IP addresses in bases. .