Subnet Calculator
About Subnet Calculator
Calculate CIDR subnet details including network address, broadcast address, subnet mask, usable range, and host count.
How to use this tool
Enter an IPv4 address and CIDR prefix to calculate the network, broadcast address, mask, usable range, and host count.
What to know
This is an address calculation, not a discovery scan. A usable address in the result is not evidence that a device is using it.