How do you determine which availability zone my subnets are located in?

When you create a subnet you need to mention the Availability Zone where to place the subnet. When using the VPC Wizard, you can select the subnet’s Availability Zone in the wizard confirmation screen. While using the API or the CLI you can mention the Availability Zone for the subnet just as you create the subnet. If you do not specify an Availability Zone, the default “No Preference” option will be selected and the subnet will be created in an available Availability Zone in that region.