Worked example
Splitting 192.168.0.0/24 once creates 192.168.0.0/25 and 192.168.0.128/25.
Subnet Tree Visualizer
Start with a parent network and interactively split it into smaller subnets. Perfect for visualizing hierarchical address allocation.
Initial Network
How it works
This tool uses Binary Subnetting. When you "split" a network block, it is divided into two equal halves by incrementing the prefix length by 1. For example, splitting a /24 results in two /25 blocks.
You can continue splitting subnets recursively until you reach a /32 (a single IP address). Use the "Join" button to merge two siblings back into their parent block.
How to use Subnet Visualizer
Initialize a parent CIDR and split nodes to see the binary hierarchy and remaining address space.
Common mistake
Sibling subnets can be joined only when they have equal prefixes and share the correct parent boundary.