What is IPv6 ULA Prefix Generator Online?
IPv6 ULA (Unique Local Addresses, RFC 4193) are the IPv6 equivalent of IPv4 RFC 1918 private ranges. The fd00::/8 prefix is locally assigned. Each block includes a 40-bit random global ID making collisions statistically impossible when merging networks.
How to Use IPv6 ULA Prefix Generator Online
- Click Generate for a new ULA prefix with a random global ID.
- Use the /48 prefix for your network, subdivided into /64 subnets.
Frequently Asked Questions
Are ULA addresses routable on the internet?
No. ULA addresses (fc00::/7) are not publicly routed — equivalent to IPv4 RFC 1918 private ranges.