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IPv6 calculator
Expand and compress addresses, derive prefixes, count /64s, and build an EUI-64 identifier from a MAC. Runs entirely in your browser — no project or account is required.
Input
IPv6 address
Prefix length
MAC addressFor the EUI-64 interface identifier
2001:db8:abcd:1234::/64
Documentation (2001:db8::/32)
- Compressed
- 2001:db8:abcd:1234::1
- Expanded
- 2001:0db8:abcd:1234:0000:0000:0000:0001
- Network address
- 2001:db8:abcd:1234::
- Last address
- 2001:db8:abcd:1234:ffff:ffff:ffff:ffff
Prefix/64
Addresses≈ 1.0 × 10^19
/64 networks1
EUI-64
The universal/local bit is flipped and fffe inserted mid-address.
- Interface identifier
- 021a:2bff:fe3c:4d5e
- Link-local address
- fe80::021a:2bff:fe3c:4d5e