This blog post is written by Pranav Chachra, Principal Product Manager, AWS.

In 2019, AWS introduced Zone Groups for AWS Local Zones. Today, we’re announcing that we are working on extending the Zone Group construct to Availability Zones (AZs).

Zone Groups were launched to help users of AWS Local Zones identify related groups of Local Zones that reside in the same geography. For example, the two interconnected Local Zones in Los Angeles (us-west-2-lax-1a and us-west-2-lax-1b) make up the us-west-2-lax-1 Zone Group. These Zone Groups are used for opting in to the Local Zones, as shown in the following image.

In October 2024, we will extend the Zone Group construct to AZs with a consistent naming format across all AWS Regions. This update will help you differentiate group of Local Zones and AZs based on their unique GroupName, improving manageability and clarity. For example, the Zone Group of AZs in the US West (Oregon) Region will now be referred to as us-west-2-zg-1, where us-west-2 indicates the Region, and zg-1 indicates it is the group of AZs in the Region. This new identifier (such as us-west-2-zg-1) will replace the current naming (such as us-west-2) for the GroupName available through the DescribeAvailabilityZones API. The names for the Local Zones Groups (such as us-west-2-lax-1) will remain the same as before.

For example, when you list your AZs, you see the current naming (such as us-west-2) for the GroupName of AZs in the US West (Oregon) Region:

The new identifier (such as us-west-2-zg-1) will replace the current naming for the GroupName of AZs, as shown in the following image.

At AWS we remain committed to responding to customer feedback and we continuously improve our services based upon that feedback. If you have questions or need further assistance, contact AWS Support on the community forums and through AWS Support.