How Azure DNS works with other Azure services

Azure DNS is a hosted DNS management and name resolution service. You can use it to create public DNS names for other applications and services that you deploy in Azure. Creating a name for an Azure service in your custom domain is simple. You just add a record of the correct type for your service.

• For dynamically allocated IP addresses, you can create a DNS CNAME record that maps to the DNS name that Azure created for your service. DNS standards prevent you from using a CNAME record for the zone apex. You can use an alias record instead. For more information, see Tutorial: Configure an alias record to refer to an Azure Public IP address.
• For statically allocated IP addresses, you can create a DNS A record by using any name, which includes a naked domain name at the zone apex.

The following table outlines the supported record types you can use for various Azure services. This article covers Azure DNS public zones, which support DNS records for Internet-facing network resources. You can't use public zones for name resolution of internal, private addresses. For private name resolution, use Azure Private DNS zones, and use Azure DNS Private Resolver to resolve DNS queries between Azure virtual networks and on-premises networks in either direction.

Azure service	Network interface	Description
Azure Application Gateway	Front-end public IP	You can create a DNS A or CNAME record.
Azure Load Balancer	Front-end public IP	You can create a DNS A or CNAME record. Load Balancer can have an IPv6 public IP address that's dynamically assigned. Create a CNAME record for an IPv6 address.
Azure Traffic Manager	Public name	You can create a Traffic Manager Linked Record that links directly to your Traffic Manager profile, returning endpoint IP addresses without a CNAME hop.
Azure Cloud Services	Public IP	For statically allocated IP addresses, you can create a DNS A record. For dynamically allocated IP addresses, you must create a CNAME record that maps to the cloudapp.net name.
Azure App Service	External IP	For external IP addresses, you can create a DNS A record. Otherwise, you must create a CNAME record that maps to the azurewebsites.net name. For more information, see Map a custom domain name to an Azure app.
Azure Resource Manager VMs	Public IP	Resource Manager VMs can have public IP addresses. A VM with a public IP address also can be behind a load balancer. You can create a DNS A, CNAME, or alias record for the public address. You can use this custom name to bypass the VIP on the load balancer.
Classic VMs	Public IP	Classic VMs created by using PowerShell or CLI can be configured with a dynamic or static (reserved) virtual address. You can create a DNS CNAME or an A record, respectively.