Network Partitioning Tool
Subnet Splitter
Easily partition any base network into multiple equal subnets. Review boundaries, usable ranges, and download configuration tables in CSV.
Subnet Breakdown Table2 Subnets
Detailed breakdown of all subnets resulting from the selected network division.
Swipe table horizontally
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Frequently Asked Questions
Clear answers to common questions about subnetting, CIDR notation, and network design.
What is a Subnet Splitter?
A Subnet Splitter takes an existing IP network (such as a
/24) and subdivides it into smaller, equal-sized subnets (such as two /25s or four /26s) by borrowing additional bits for the network prefix.How many subnets are created when splitting?
The number of subnets created is 2^(Target CIDR - Base CIDR). For example, splitting a
/24 into /27 subnets yields 2^(27 - 24) = 2^3 = 8 equal subnets, each supporting 30 usable hosts.