IPv4 Subnet Calculator
Calculate an IPv4 network, subnet mask, wildcard mask, broadcast address and usable host range from CIDR notation.
Results
Enter your values and select calculate subnet to see the result.
Plan an IPv4 subnet
Enter an IPv4 address followed by a prefix from /0 to /32. The calculator normalizes host bits to show the network boundary. For example, 192.168.1.42/24 belongs to 192.168.1.0/24, with a subnet mask of 255.255.255.0.
Conventional subnets reserve the network and broadcast addresses. A /31 has two addresses for a point-to-point link; a /32 identifies one host. Actual address availability depends on your network configuration.
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