Calculate subnets and network ranges with CIDR
Calculate network addresses, broadcast addresses, host ranges, and netmasks. Essential for network planning, IP allocation, and CIDR notation conversion.
Classless Inter-Domain Routing. Notation like /24 represents the netmask bits. Smaller numbers = more hosts.
Determines which part of IP is network vs host. /24 = 254 usable hosts, /25 = 126 usable hosts.
Inverse of netmask. Used in ACLs and routing. /24 netmask = 0.0.0.255 wildcard.