Free tools

AWS IP Address Planning Tools

A well thought out IP Address Plan is designed with both subnetting and supernetting in mind.

Subnetting and supernetting are opposites and can sometimes be difficult to combine.

Below I've added a couple of tools created to help you design the best IP Address plan for your needs, giving you the opportunity to mix, match and adjust the values as you go along, always seeing the consequences of your choices.

These tools are perfect for multi-account, multi-region architectures where you need full, transitive, interconnectivity between VPCs and accounts.

for subnetting

CIDR Block Calculator

Create and manage hierarchical IP address plans with an interactive interface.

Open Calculator
for supernetting

CIDR Block Estimator

Calculate the optimal top-level CIDR block size based on your infrastructure requirements. Helps prevent IP address space wastage.

Open Estimator