Azure Subnet Calculator

Calculate IPv4 and IPv6 subnet boundaries using Azure virtual network (VNet) and custom public prefix rules. Apply service presets for Azure networking services, Azure Kubernetes Service (AKS), and current or legacy Azure Container Apps environment profiles. Everything is calculated in your browser.

Try

Azure settings

Choose an allocation model and optional service preset. Rules are advisory; follow the linked documentation when provisioning.

Accepted input formats

CIDR and addresses



Masks and host counts



Ranges and subdivisions