Address planning/ 04

IPv6 calculator

Validate, expand, compress, and inspect IPv6 network prefixes.

Runs locally

IPv6 input

IPv6 address / prefix

Prefix is optional; a bare address defaults to /128.

Try an example

Supports compressed, full-length, and embedded IPv4 notation. Zone identifiers such as %eth0 are not accepted.

Results

Compressed: 2001:db8:abcd:12::1
Expanded: 2001:0db8:abcd:0012:0000:0000:0000:0001
Prefix: /64
Network / prefix: 2001:db8:abcd:12::/64
Address type: Documentation
Exact address count: 18446744073709551616

128 bits. One address.

0–15200116 network bits

16–310db816 network bits

32–47abcd16 network bits

48–63001216 network bits

64–7900000 network bits

80–9500000 network bits

96–11100000 network bits

112–12700010 network bits

IPv6 has no broadcast address. Compression follows RFC 5952: lowercase, longest zero run, first run on ties. Address count describes the block, not assignable-host policy.

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