Quickstart: Create a public IP address prefix using the Azure portal

Learn about a public IP address prefix and how to create, change, and delete one. A public IP address prefix is a contiguous range of standard SKU public IP addresses.

When you create a public IP address resource, you can assign a static public IP address from the prefix and associate the address to virtual machines, load balancers, or other resources. For more information, see Public IP address prefix overview.

Prerequisites

• If you don't already have an Azure account, sign up for a free trial account.

Sign in to Azure

Sign in to the Azure portal.

Create a public IP address prefix

IPv4

In this section, you create a public IP prefix using the Azure portal. Use the following examples to create a IPv4 public IP prefix. To create a IPv6 public IP prefix, see IPv6.

1. In the search box at the top of the portal, enter Public IP.

2. In the search results, select Public IP Prefixes.

3. Select + Create.

4. In Create public IP prefix, enter, or select the following information in the Basics tab:

Default

Setting	Value
Project details
Resource group	Select Create new and enter test-rg. Select OK.
Instance details
Name	Enter public-ip-prefix.
Region	Select East US 2.
IP version	Select IPv4.
Prefix ownership	Select Microsoft owned.
Prefix size	Select your prefix size.
Tier	Leave the default of Regional.
Routing preference	Leave the default of Microsoft network.
Availability zone	Leave the default of Zone-redundant.

5. Select the Review + create tab or the blue Review + create button at the bottom of the page.

6. Select Create.

Routing preference

This section shows you how to configure the routing preference for an ISP network (Internet option) for a public IP prefix. After you create the public IP prefix, you can create public IP addresses and associate them with the following Azure resources:

• Azure Virtual Machines
• Azure Virtual Machine Scale Set
• Azure Kubernetes Service
• Azure Load Balancer
• Azure Application Gateway
• Azure Firewall

By default, the routing preference for a public IP address is set to the Microsoft global network for all Azure services and can be associated with any Azure service.

Note

Although you can create a public IP prefix with either an IPv4 or IPv6 prefix, the Internet option of Routing preference supports only IPv4.

Setting	Value
Project details
Resource group	Select Create new and enter test-rg. Select OK.
Instance details
Name	Enter public-ip-prefix.
Region	Select East US 2.
IP version	Select IPv4.
Prefix ownership	Select Microsoft owned.
Prefix size	Select your prefix size.
Tier	Leave the default of Regional.
Routing preference	Select Internet.

5. Select the Review + create tab or the blue Review + create button at the bottom of the page.

6. Select Create.

Tier

Public IP prefixes are associated with a single region. The Global tier spans an IP address across multiple regions and is required for the front ends of cross-region load balancers. For a Global tier, Region must be a home region. For more information, see Cross-region load balancer and Home regions.

Setting	Value
Project details
Resource group	Select Create new and enter test-rg. Select OK.
Instance details
Name	Enter public-ip-prefix.
Region	Select East US 2.
IP version	Select IPv4.
Prefix ownership	Select Microsoft owned.
Prefix size	Select your prefix size.
Tier	Select Global.

5. Select the Review + create tab or the blue Review + create button at the bottom of the page.

6. Select Create.

IPv6

In this section, you create a public IP prefix using the Azure portal. Use the following examples to create a IPv6 public IP prefix.

1. In the search box at the top of the portal, enter Public IP.

2. In the search results, select Public IP Prefixes.

3. Select + Create.

4. In Create public IP prefix, enter, or select the following information in the Basics tab:

   Setting	Value
   Project details
   Resource group	Select Create new and enter test-rg. Select OK.
   Instance details
   Name	Enter public-ip-prefix.
   Region	Select East US 2.
   IP version	Select IPv6.
   Prefix size	Select your prefix size.
   Availability zone	Leave the default of Zone-redundant.

   

5. Select the Review + create tab or the blue Review + create button at the bottom of the page.

6. Select Create.

Create a static public IP address from a prefix

Once you create a prefix, you must create static IP addresses from the prefix. In this section, you create a static IP address from the prefix you created earlier.

1. In the search box at the top of the portal, enter Public IP.

2. In the search results, select Public IP Prefixes.

3. In Public IP Prefixes, select public-ip-prefix.

4. In Overview of public-ip-prefix, select + Add IP address.

   

5. Enter public-ip-1 in Name.

6. Leave the rest of the selections at the default.

7. Select Add.

   Note

   Only static public IP addresses created with the standard SKU can be assigned from the prefix's range. To learn more about public IP address SKUs, see public IP address.

8. Select Public IP addresses in Settings to view the created IP address.

Delete a prefix

In this section, you learn how to view or delete a prefix.

1. In the search box at the top of the portal, enter Public IP.

2. In the search results, select Public IP Prefixes.

3. In Public IP Prefixes, select public-ip-prefix.

4. Select Delete in the Overview section.

   Note

   If addresses within the prefix are associated to public IP address resources, you must first delete the public IP address resources. See delete a public IP address.

Clean up resources

In this article, you created a public IP prefix and a public IP from that prefix.

When you're done with the public IP prefix, delete the resource group and all of the resources it contains:

1. Search for and select test-rg.

2. Select Delete resource group.

3. Enter test-rg in Enter resource group name to confirm deletion and select Delete.

Next steps

Advance to the next article to learn how to create a public IP address:

Create public IP address using the Azure portal