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Subnet Calculator
NetworkCalculate an IPv4 network, mask, broadcast, and host range from CIDR notation. /31 is treated as a point-to-point network; /32 is a single host.
Runs locally in your browser. Nothing you enter is uploaded.
Network boundaries and host ranges will appear here.
IPv4 only. /31 uses point-to-point semantics, while /32 represents one host. This is an address calculation, not a network scan.