Calculate IPv4/IPv6 ranges, masks, address counts, and subnet containment
The prefix is optional; IPv4 defaults to /32 and IPv6 to /128. Compressed and IPv4-mapped IPv6 are supported.
IPv4192.168.10.42192.168.10.0/24255.255.255.00.0.0.255192.168.10.1192.168.10.254192.168.10.25525625442.10.168.192.in-addr.arpa11000000.10101000.00001010.00101010All parsing and subnet calculation happens locally. IPv4 /31 networks are treated as two usable point-to-point addresses per RFC 3021.
Calculate IPv4/IPv6 ranges, masks, address counts, and subnet containment. It requires no desktop installation and supports common developer workflows directly in a modern browser.
Core processing runs locally in your browser. Tool input is not uploaded; downloads and clipboard actions are handled by the browser.
Continue with the next step in the same workflow.
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