Azure Hub & Spoke Subnet Planner

Visualise address space allocations for hubs, spokes, VNets, and subnets with Azure guardrails.

Plan Azure hub & spoke address spaces

  • Start from an overall address space, carve out a hub, then allocate spokes.
  • Design virtual networks and subnets with guardrails for Azure reserved IPs.
  • Visualise the hierarchy and ensure everything fits before you deploy.

How it works

  • Adjust prefixes for the hub, spokes, VNets, and subnets.
  • Use quick-add templates for Azure Bastion, Firewall, Gateway, and more.
  • Export-ready table with CIDRs, usable hosts, and Azure reserved counts.