IPv4 + IPv6
Switch modes instantly and calculate subnet boundaries accurately.
Fast subnet math for IPv4 and IPv6. Built for practical network planning with clean, copy-ready results.
Switch modes instantly and calculate subnet boundaries accurately.
See IP class/type, binary values, integer/hex IDs, and reverse DNS.
Use CIDR presets, normalize addresses, and copy all results in one tap.
Designed for readability in dark mode with focused cards and direct export-ready output.