IPv6 calculator

Expand and compress addresses, derive prefixes, count /64s, and build an EUI-64 identifier from a MAC.

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