CUBIXSERV TOOLS
IPv4 subnet and CIDR calculator
Calculate an IPv4 mask, network, address range and address count locally, including /31 and /32.
Local processing
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Result
Local processingHow to use this tool
Enter a dotted IPv4 address and either a CIDR prefix or a contiguous dotted netmask. Copy the calculated range. No router or service is changed.
Compatibility and limits
For /31 point-to-point links both addresses are usable under RFC 3021; there is no conventional broadcast. A /32 identifies one address. Address counts do not establish ownership, routing or public reachability.