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CIDR splitter

Split an IPv4 network into equal subnets and inspect each address range.

Subnet plan4 equal subnets
Parent network192.168.1.0/24
Addresses per subnet64
26 network bits6 host bits
192.168.1.0/26192.168.1.0 → 192.168.1.6364 addresses · /26

Select a subnet to inspect its boundaries. The saved file contains the entire plan.

A longer prefix creates smaller subnets. Limit: 1,024 subnets.
Processed on your device

How it works & useful details

How it works & limits

Split one IPv4 CIDR into equal-sized subnets. The new prefix must be at least as long as the original. Host bits in the input are cleared; the normalized parent is shown. The output covers the parent exactly.

At most 1,024 subnets can be created. /31 and /32 blocks are supported. Counts shown here include all addresses in each block; use the subnet calculator for conventional host counts. Saved text contains every resulting CIDR, one per line.

Your working space

Explore the live view, then save copyable text and a downloadable file. Everything is calculated locally. Inputs are not stored; refreshing clears them.

These tools inspect address notation and ranges. They do not contact addresses, check availability or establish connectivity.