Calculate an IPv6 subnet from an address and prefix length: network prefix, first and last address and total addresses, using exact 128-bit arithmetic in your browser.
Calculate an IPv6 network and inclusive address range with exact 128-bit math.
Local calculation only. IPv6 has no broadcast address; this displays the inclusive prefix range. See the prefix length cheat sheet for common IPv6 sizes.
Calculate an IPv6 subnet from an address and prefix length: network prefix, first and last address and total addresses, using exact 128-bit arithmetic in your browser.
Review the limits and privacy notes shown with the tool. Important configuration or security decisions should be checked against authoritative systems and your organization’s approved procedures.
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