IPv6 ULA generator

Generate your own local, non-routable IP addresses for your network according to RFC4193.

Info

This tool uses the first method suggested by IETF using the current timestamp plus the mac address, sha1 hashed, and the lower 40 bits to generate your random ULA.

IPv6 ULA:

fdc4:26dc:3b8e::/48

First routable block:

fdc4:26dc:3b8e:0::/64

Last routable block:

fdc4:26dc:3b8e:ffff::/64