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All calculations are performed locally in your browser. Your data never leaves your device.
Enter a CIDR notation like 192.168.1.0/24 to calculate subnet information. The tool will show you the network address, broadcast address, usable host range, and more.
/8 = 16,777,214 hosts
/16 = 65,534 hosts
/24 = 254 hosts
10.0.0.0/8
172.16.0.0/12
192.168.0.0/16