IP Subnet Calculator
Find IPv4 and IPv6 networks, address ranges and CIDR sizes.
Runs on your device · No input uploadsResult
LOCALEnter your values, then choose Calculate.
How this tool works
Enter an IPv4 or IPv6 address with a slash prefix. Everything is calculated locally; this tool does not scan the network. IPv4 /31 follows the point-to-point host convention. IPv6 lists the mathematical address range without claiming that every address is assignable.