IPv6 ULA Generator
Generate a compliant RFC 4193 Unique Local Address block with detailed global IDs, subnets, and host examples.
Complies with RFC 4193 specifications for private network addressing.
About IPv6 ULA Addresses
Learn about Unique Local Address structures and private network architectures.
Unique Local Addresses (ULA) are IPv6 addresses in the fc00::/7 prefix block meant for private networks. Locally assigned blocks use fd00::/8 with a pseudo-random 40-bit Global ID, minimizing address collision risks if multiple private sites merge.
Global ID Randomization
Generates high-entropy pseudo-random 40-bit IDs to ensure uniqueness across private enterprise networks.
Structured /64 Blocks
Combines the site /48 prefix with customizable subnet identifiers for clean host-level configuration.
Non-Routable on Internet
ULAs are designed exclusively for internal site connectivity and will not route on the public global IPv6 backbone.
100% Secure & Private
Random generation happens entirely in your browser using cryptographically secure client-side randomness.
One-Click Copy
Easily copy all generation components directly to your clipboard with visual confirmation feedback.
Dynamic Updates
Outputs update instantly as you input custom Global IDs or Subnets for a seamless configuration workflow.