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IP Subnet Calculator

CIDR · Network / Broadcast · Usable Hosts · Wildcard Mask

When to use: Use to calculate subnet details from any IPv4 CIDR notation. Returns network address, broadcast address, subnet mask, wildcard mask, first/last usable host, and total usable hosts. Essential for VLAN design, IP address planning (IPAM), firewall ACL configuration, and network documentation. Use the quick-select presets for common enterprise subnets.

Input
/
Quick Presets
Usable Hosts
254
192.168.1.0/24
Subnet Details
Network Address192.168.1.0
Subnet Mask255.255.255.0
Wildcard Mask0.0.0.255
Broadcast Address192.168.1.255
First Usable Host192.168.1.1
Last Usable Host192.168.1.254
Usable Hosts254
Total Addresses256