Enter the Azure Virtual Network (VNet) Address you wish to subnet:
Click below to split and join subnets.
| Subnet name | Subnet address | Azure Subnet Useable IPs | Azure Usable Hosts | Divide | Join |
|---|---|---|---|---|---|
| 192.168.1.0/24 | 192.168.1.4 - 192.168.1.254 | 251 | Divide |  |
| Reserved Subnet Name | min. Size of Subnet | Max. Size of Subnet | Recommand Size of Subnet | Related Azure Services |
|---|---|---|---|---|
| GatewaySubnet | /27 | /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 |
| Delegated Services Name | min. Size of Subnet | Max. Size of Subnet | Recommand Size of Subnet | Related Azure Services |
|---|---|---|---|---|
| Microsoft.DBforPostgreSQL/flexibleServers | /28 | /27 | /27 | Azure Database for PostgreSQL - Flexible Server |
| Microsoft.Web/serverFarms | /26 | /27 | /27 | Azure App Service |
| Microsoft.Network/dnsResolvers | /28 | N/A | /28 | Azure Private DNS Resolver (inbound) |
| Microsoft.Network/dnsResolvers | /28 | N/A | /28 | Azure Private DNS Resolver (outbound) |
| Microsoft.AVS/privateClouds | /22 | /22 | /22 | Azure VMware Solution |
| Azure PaaS | min. Size of Subnet | Max. Size of Subnet | Recommand Size of Subnet | Dedicated Subnet? |
|---|---|---|---|---|
| Azure Virtual WAN Hub | /24 | N/A | /24 | Yes |
| Azure Application Gateway | /26 (Standard or WAF SKU) | N/A | /24 (Standard_v2 or WAF_v2 SKU) | Yes |
| Azure AD Domain Services (AADDS) | ? | N/A | ? | No |
| Azure SQL Managed Instance (SQL MI) | /27 | N/A | N/A | Yes |
| App Services (Web Apps, Functions, API Apps) | /28 | N/A | /26 | Yes |
| Azure API Management | ? | N/A | ? | Yes |
| Azure Container Instances (ACI) | ? | N/A | ? | Yes |
| Azure Spring Cloud | /28 | N/A | Depends on Requirement | Yes |
| Azure Red Hat OpenShift Master Subnet | /27 | /27 | /27 | Yes |
| Azure Red Hat OpenShift Worker Subnet | /27 | /24 | /25 | Yes |
Special Thanks to davidc.net + GitHub Copilot Enterprise
The source code for Azure Edition page has been forked and ported from davidc.net and GitHub Copilot Enterprise for suggestions on modifications to HTML / CSS / Javascript.
Maintainer: Phil Huang (phil.huang@microsoft.com), Senior Cloud Solution Architect, Microsoft Taiwan