Visual Subnet Calculator (Azure Edition)

Enter the Azure Virtual Network (VNet) Address you wish to subnet:

Network Address Mask bits

Show columns:

Click below to split and join subnets.
If you wish to save this subnetting for later, copy the bookmark this hyperlink.

Subnet name Subnet address Netmask Range of addresses Azure Subnet Useable IPs Azure Usable Hosts Divide Join

Reserved Subnet Name min. Size of Subnet Max. Size of Subnet Recommand Size of Subnet Related Azure Services
GatewaySubnet /29 /27 /27 Azure Virtual Network Gateway / ExpressRoute / Site-to-Site VPN
RouteServerSubnet /27 /24 /27 Azure Route Server
AzureBastionSubnet /26 /24 /26 Azure Bastion
AzureFirewallSubnet /26 /26 /26 Azure Firewall
AzureFirewallManagementSubnet /26 /16 /26 Azure Firewall Manager