Network Tool
IP Subnet Calculator
Enter an IP address and subnet mask or CIDR notation to calculate the network range, broadcast address, and usable host count.
IP Address / CIDR
What is Subnet Calculation?
IP networking divides addresses into smaller groups called subnets. Knowing the boundaries of a subnet helps you plan networks, configure firewalls, and troubleshoot routing problems. CIDR notation (like 192.168.1.0/24) is the shorthand for describing a subnet. This calculator takes any IP and CIDR or subnet mask and tells you the full network range, total hosts, and usable addresses.
CIDR notationNetwork & broadcast addressesHost count calculationInstant results
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