Tutorial: Host your domain in Azure DNS

You can use Azure DNS to host your DNS domain and manage your DNS records. By hosting your domains in Azure, you can manage your DNS records using the same credentials, APIs, tools, and billing as your other Azure services.

Suppose you buy the domain contoso.com from a domain name registrar and then create a zone with the name contoso.com in Azure DNS. Since you're the owner of the domain, your registrar offers you the option to configure the name server (NS) records for your domain. The registrar stores the NS records in the .com parent zone. Internet users around the world are then directed to your domain in your Azure DNS zone when they try to resolve DNS records in contoso.com.

Overview

To host your domain in Azure:

• Create the DNS zone.
• Create resource records in the DNS zone.
• Retrieve the list of Azure nameservers for your DNS zone.
• Delegate the domain to Azure's nameservers at your registrar.

For example:

Open diagram: A simple diagram of a DNS zone hosted in Azure that is delegated at the registrar.

In this tutorial, you learn how to:

• Create a DNS zone.
• Retrieve a list of name servers.
• Delegate the domain.
• Verify the delegation is working.

If you don’t have an Azure subscription, create a free account before you begin.

Prerequisites

• An Azure account with an active subscription.
• A domain name that you can host in Azure DNS. You must have full control of this domain. Full control includes the ability to set the name server (NS) records for the domain.

Note

In this tutorial, contoso.xyz is used as an example domain name. Replace contoso.xyz with your own domain name.

Sign in to Azure

Sign in to the Azure portal.

Create a DNS zone

1. In the Azure portal, enter dns zone in the search box at the top of the portal, and then select DNS zones from the search results.

2. In DNS zones, select + Create.

3. In the Create DNS zone page, enter or select the following information in the Basics tab:

   Setting	Value
   Project details
   Subscription	Select your Azure subscription.
   Resource group	Choose an existing resource group or select Create new and enter a name for the new resource group. For example: myResourceGroup.
   Instance details
   This zone is a child of an existing zone already hosted in Azure DNS	Clear this checkbox since the DNS zone isn't a child zone.
   Name	Enter your DNS zone name. For example: contoso.xyz.
   Resource group location	If you created a new resource group, choose a location. The resource group location doesn't affect your DNS zone service, which is global and not bound to a location.

   Open diagram: Screenshot of the Create DNS zone page showing the settings used in this tutorial to create a parent DNS zone.

4. Select Review + create.

5. Select Create.

   Note

   If the new zone that you are creating is a child zone see Create a child DNS zone tutorial.

Retrieve name servers

Before you can delegate your DNS zone to Azure DNS, you need to know the name servers for your zone. Azure DNS assigns name servers from a pool each time a zone is created.

1. In the Azure portal, enter DNS zones in the search box at the top of the portal and then select DNS zones from the search results.
2. In DNS zones, select the name of your zone. For example: contoso.xyz.
3. On the Overview page, retrieve the name servers. In this example, the DNS zone contoso.xyz has been assigned name servers ns1-37.azure-dns.com, ns2-37.azure-dns.net, ns3-37.azure-dns.org, and ns4-37.azure-dns.info:

Open diagram: Screenshot showing the overview of DNS zone contoso.xyz.

Azure DNS automatically creates authoritative NS records in your zone for the assigned name servers.

Delegate the domain

After the DNS zone is created, you must update the parent domain with the Azure DNS name servers by registering the domain with a domain registrar. Each registrar has its own DNS management tools to assign the name server records for a domain. In the example used here, the parent domain is xyz.

1. In the registrar's DNS management page, create or edit the NS records to assign the Azure DNS name servers.
2. When you delegate a domain to Azure DNS, you must use the name servers that Azure DNS provides. Use all four name servers, regardless of the name of your domain. Domain delegation doesn't require a name server to use the same top-level domain as your domain.

Important

When you copy each name server address, make sure you copy the trailing period at the end of the address. The trailing period indicates the end of a fully qualified domain name. Some registrars append the period if the NS name doesn't have it at the end. To be compliant with the DNS RFC, include the trailing period. Please note that some registrars append the trailing period on your behalf. If you are unsure, check with your registrar on whether they append the trailing period on your behalf or not.

Delegations that use name servers in your own zone, sometimes called vanity name servers, aren't currently supported in Azure DNS.

Verify the delegation

After you complete the delegation, you can verify that it's working by using a tool such as nslookup to query the Start of Authority (SOA) record for your zone. The SOA record is automatically created when the zone is created. You may need to wait at least 10 minutes after you complete the delegation, before you can successfully verify that it's working. It can take a while for changes to propagate through the DNS system.

You don't have to specify the Azure DNS name servers. If the delegation is set up correctly, the normal DNS resolution process finds the name servers automatically.

1. From a command prompt, enter a nslookup command similar to the following example:

   nslookup -type=SOA contoso.xyz
   

2. Verify that your response looks similar to the following nslookup output:

   contoso.xyz
           primary name server = ns1-37.azure-dns.com
           responsible mail addr = azuredns-hostmaster.microsoft.com
           serial = 1
           refresh = 3600 (1 hour)
           retry = 300 (5 mins)
           expire = 604800 (7 days)
           default TTL = 300 (5 mins)
   

Clean up resources

When no longer needed, you can delete all resources created in this tutorial by following these steps:

1. On the Azure portal menu, select Resource groups.

2. Select the myResourceGroup resource group.

3. Select Delete resource group.

4. Enter myResourceGroup and select Delete.