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IPv6 ULA Generator

Generate IPv6 Unique Local Addresses (ULA) from a seed or randomly. Get the /48 prefix, global ID, and example subnet addresses for your network.

Frequently Asked Questions

What is IPv6 ULA?
Unique Local Addresses (ULA) are the IPv6 equivalent of IPv4 private addresses (like 192.168.x.x). They use the fc00::/7 range, with fd00::/8 being locally assigned.
Should I use a seed?
Using a seed (like your company name) produces a deterministic global ID. The same seed always generates the same prefix. Leave blank for a random one.
How many subnets can I create?
A /48 ULA prefix gives you 16 bits for subnet IDs, allowing up to 65,536 individual /64 subnets.

Related Tools

🔢IPv4 Address Converter🌐IPv4 Subnet Calculator📡IPv4 Range Expander

How to Use

  1. 1 Optionally enter a seed string (e.g., company name) for deterministic generation.
  2. 2 Leave blank for a random global ID.
  3. 3 View the generated /48 prefix and example subnet addresses.
  4. 4 Use the prefix for your private IPv6 network addressing.