IPv6 Prefix Reference

Key IPv6 prefixes with use and example addresses.

Prefix	Use	Example
::/128	Unspecified	:: (no address yet)
::1/128	Loopback	::1 (localhost)
2000::/3	Global unicast	2606:4700:4700::1111
fe80::/10	Link-local	fe80::1 (same link only)
fc00::/7	Unique-local	fd00::1 (private)
ff00::/8	Multicast	ff02::1 (all nodes)
2001:db8::/32	Documentation	2001:db8::1 (docs only)
::ffff:0:0/96	IPv4-mapped	::ffff:192.0.2.1

How to read the result

The prefix decides scope: ::1 is loopback, fe80::/10 stays on-link, fc00::/7 is private, 2000::/3 is public, ff00::/8 is multicast, 2001:db8::/32 is docs-only.

Example

fe80::/10 → link-local, never routed off-link.

FAQ

Link-local vs unique-local?

Link-local (fe80::/10) never leaves the link; unique-local (fc00::/7) is routable inside an org like IPv4 private space.

What is ::ffff:0:0/96?

IPv4-mapped IPv6: embeds an IPv4 address, e.g. ::ffff:192.0.2.1, for dual-stack sockets.