IPv6 Decoder
Analyze an IPv6 address and understand its canonical form, reverse DNS form, address type, and embedded IPv4 data.
What this checks
- IPv6 syntax, canonical compressed form, expanded form, hex groups, decimal value, binary value, and reverse DNS nibble form.
- Address type signals such as loopback, unspecified, link-local, unique local, multicast, documentation, IPv4-mapped, 6to4, Teredo, and global unicast.
- Embedded IPv4 data for IPv4-mapped, 6to4, and Teredo addresses.
How to interpret results
- Canonical form is the shortest normalized form for display and comparison.
- Expanded form and reverse DNS form are useful for DNS, documentation, and troubleshooting workflows.
- Special address types explain whether the address is routable, local-only, documentation-only, or carrying IPv4 transition data.
Common issues
- Zone identifiers such as %eth0 are interface suffixes and are not part of the IPv6 address value decoded here.
- ARIN RDAP is linked as an external lookup; this client-only tool does not fetch registry data.
Privacy note
IPv6 Decoder runs locally in the browser and does not send the decoded address to the server.
Key Tools and References
Frequently Asked Questions
What does the IPv6 Decoder show?
It shows canonical and expanded IPv6 forms, hex groups, decimal and binary values, reverse DNS format, address classification, and embedded IPv4 details when present.
Does the IPv6 Decoder call a server?
No. The first version runs in the browser and provides an external ARIN RDAP link instead of fetching registry data server-side.