Network Planner & VLSM Subnetting Tool

Enter your main network block and departments/devices to generate an optimal subnetting plan.

Why Use Network Segmentation & VLSM?

Segmentation improves security and traffic management. VLSM (Variable Length Subnet Mask) lets you right-size subnets for each department or device group, so you don’t waste addresses. This tool helps you design a modern, efficient, and secure network plan for your home, office, or enterprise.

Department / Purpose Used For (optional) Devices / Users Count

How Does VLSM Subnetting Work?

VLSM (Variable Length Subnet Mask) allows you to divide a network block into subnets of different sizes, perfectly matching each department’s or device group’s needs. This tool sorts your requirements, allocates subnets from largest to smallest, and ensures no address waste or overlap. You get a clear, exportable plan for your network.

  1. Input your main network block (e.g., 10.0.1.0/24).
  2. Add departments or device groups with the number of users/devices.
  3. Tool calculates optimal subnets for each group using VLSM.
  4. Get a table with subnet, mask, hosts, gateway, and more for each group.

Export your plan as PDF or CSV for documentation or implementation.