The Zadein Subnet Calculator computes network and host address ranges for a given IP address and subnet mask or CIDR notation. It is an essential tool for network engineers and anyone working with IP address planning.
CIDR (Classless Inter-Domain Routing) notation represents a subnet as an IP address followed by a prefix length, such as 192.168.1.0/24, where /24 means the first 24 bits are the network portion.
The tool is primarily designed for IPv4 addresses. IPv6 support may be limited.
A /24 subnet has 256 addresses total. Subtracting the network address and broadcast address leaves 254 usable host addresses.