fe80:: Link-Local: Valid only on the local physical link. Requires a scope ID (e.g. %eth0) to function.
fd00::/8 ULA (Private): Unique Local Addresses. Like IPv4 private ranges (192.168.x). Not routable on the public internet.
2001:db8::/32 Docs: Reserved purely for documentation and examples.
3fff::/20 RFC 9637: Newer reserved block for documentation and experimental use.
/64 Standard subnet for a single LAN segment (contains 18 quintillion IPs).
/48 Standard assignment for a whole site or organization.
/56 Common assignment for small home/office sites.
/128 A single specific host address.
The "Copy Canonical" button ensures your address is compliant:
• All lowercase characters.
• Leading zeros in groups are removed.
• Longest run of zeros is compressed to ::.
• Essential for consistent configuration files.