Subnet splitter (VLSM)

Divide an IPv4 network into smaller equal subnets and list each network, host range, broadcast and host count.

Runs in your browser · nothing is sentIP & subnetting

Network (CIDR)New prefix length

4 subnets.

Network address	First host	Last host	Broadcast	Number of hosts
192.168.0.0/26	192.168.0.1	192.168.0.62	192.168.0.63	62
192.168.0.64/26	192.168.0.65	192.168.0.126	192.168.0.127	62
192.168.0.128/26	192.168.0.129	192.168.0.190	192.168.0.191	62
192.168.0.192/26	192.168.0.193	192.168.0.254	192.168.0.255	62

About this tool

Enter a network and the new prefix length. You get the full list of subnets, ready to copy.

🔒 Your input stays in your browser and is never sent anywhere.

How many subnets do I get?

Two to the power of the difference in prefix length. Splitting a /24 into /26 gives 4 subnets.

VPC/subnet plannerPlan subnets inside a VPC or VNet, see usable addresses after provider reservations, catch overlaps, and export Terraform or CloudFormation.

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