IPv6 Network Planning Tool

Network: Prefix:

Quick Load:

Subnet	Contains	Note	Color	Split	Join
Enter a network address and click Go to start

How to Use

Enter an IPv6 address and click Go to load.

Click green Split buttons to divide subnets.

Click red Join buttons to merge subnets back together.

Add notes and colors to document allocations.

Click Share to copy the URL with current state.

Click Export CSV to download subnet plans.

Why use this tool

Nibble-aligned splitting divides networks at 4-bit boundaries for easy hexadecimal management
Custom split targets support geographical denomination models and specialized addressing schemes
Prefix range from /16 to /64 with /64 as minimum
Location-based planning shows /48 counts for large allocations and /64 counts for smaller subnets
Visual hierarchy join buttons span rows to show parent-child relationships
Annotations document allocations with notes and colors
Shareable URLs encode complete state for sharing
CSV export download plans with hierarchy indentation