Privacy IPv6 Subnet Calculator
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0-128 (Standard: 64 for LANs)
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Enter an IP address and click Calculate
About IPv6 Subnet Calculator
This calculator helps you work with IPv6 addresses and subnets. Enter an IPv6 address with prefix length (e.g., 2001:db8::/32) to calculate the network range, expand abbreviated addresses, or compress to shortest form. All calculations are performed in your browser.
IPv6 Addressing Explained:
- 128-bit Addresses: IPv6 uses 128-bit addresses written as 8 groups of 4 hex digits (e.g., 2001:0db8:85a3:0000:0000:8a2e:0370:7334).
- Abbreviation with ::: Consecutive groups of zeros can be replaced with :: once per address (e.g., 2001:db8::1).
- Common Prefixes: /64 is standard for LANs (18 quintillion addresses), /48 for sites, /32 for ISP allocations.
- Address Types: Global Unicast (public), Link-Local (fe80::), Unique Local (fc00::/7), Multicast (ff00::/8).
🔒 Privacy-Friendly: All calculations are performed entirely in your browser. No IP addresses or network data is sent to any server.
⚠️ Disclaimer: This calculator is for educational and planning purposes. Always verify network configurations before implementation.
This tool answers questions like:
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