Network Tools
Subnet / CIDR Calculator
Calculate subnet mask, network address, broadcast address, first/last host, and total hosts from CIDR notation. Supports IPv4 subnetting.
Input
Format: IP/prefix (e.g. 192.168.1.0/24)
Common networks
Network (bin):
Mask (bin):
Result
Enter a valid CIDR notation like 192.168.1.0/24
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