IPv6 ULA Prefix Generator
Generate a random /48 IPv6 unique-local prefix (RFC 4193).
fd2b:6991:6c57::/48About this tool
RFC 4193 reserves fc00::/7 for unique-local addressing (the IPv6 equivalent of RFC 1918). The fd00::/8 half is intended for locally-assigned prefixes — the tool draws 40 random bits to give you a globally-unique /48.