IPv6 Tools
Expand an abbreviated IPv6 address to its full form, or compress a full IPv6 address to its shortest representation.
IPv6 Analysis Results
Address Formats
Address Information
Technical Details
Expanded and compressed IPv6
IPv6 addresses contain eight hexadecimal groups. Compression can remove leading zeroes and replace one continuous run of zero groups with ::. Expansion restores the full eight-group representation.
Common IPv6 address types
::1is loopback.fe80::/10is link-local and normally valid only on the local network segment.2001:db8::/32is reserved for documentation examples.- Global unicast addresses are routable on the public IPv6 internet when routing and firewall rules allow it.
DNS and reverse DNS notes
IPv6 forward DNS uses AAAA records. Reverse DNS uses nibble format under ip6.arpa, which is longer and more error-prone than IPv4 PTR notation.
Common formatting mistakes
Use :: only once in an address, keep each group to four hex characters or fewer, and avoid mixing IPv4 and IPv6 notation unless using a valid IPv4-mapped address.
Related tools
Plan networks with the Subnet Calculator, check AAAA records with DNS Lookup, and inspect public ranges with IP Geolocation.
Quick Reference
This tool helps with common network administration tasks. Run the check above and review the results. For detailed troubleshooting, see the related tools below.