About IP-Planner

IP-Planner is an IPv4 calculator and planner. It helps you plan a full building, campus, or organization's IP scheme avoiding accidental bit boundary overlap. Everything runs in your browser — nothing you type is sent anywhere in the free version.

Subnet Calculator

Enter an address and prefix to get the netmask, wildcard, network, broadcast, usable host range and host count. /31 links follow RFC 3021 and /32 is a single host.

Subnet Breakout Planner

Choose a supernet and a prefix range, then place labels like the examples “Building 12” or “Vlan 85” on the blocks where you wish to assign them. Each label is automatically assigned its correct network, e.g. “Building 12 - 10.150.0.0/25”, and the plan can be exported as a plain-text tree.

Visual IPAM

The Allocations section and the ability to save plans with the subscription option allows this system to be used as a visual IPAM. This provides a very unique and intuitive IP Address Management system for your organization.