Worked example
2001:db8:1::1234/64 normalizes to the documentation network 2001:db8:1::/64.
IPv6 Address & Subnet Tool
Analyze IPv6 addresses, expand shortened notation, or calculate subnet boundaries. IPv6 uses 128-bit addresses, typically represented as 8 groups of 4 hexadecimal digits.
IPv6 Configuration
Understanding IPv6
IPv6 (Internet Protocol version 6) is the successor to IPv4. It uses a 128-bit address space, allowing for 2^128 (approximately 3.4 x 10^38) unique addresses. This vast space eliminates the need for Network Address Translation (NAT) and enables a more efficient, hierarchical routing structure.
How to use IPv6 Calculator
Paste an IPv6 address or prefix to normalize, expand, compress, and inspect its network boundaries without losing 128-bit precision.
Common mistake
IPv6 subnetting normally uses /64 for LANs; address conservation rules from IPv4 should not be applied blindly.