» Data Source: aws_availability_zones

The Availability Zones data source allows access to the list of AWS Availability Zones which can be accessed by an AWS account within the region configured in the provider.

This is different from the aws_availability_zone (singular) data source, which provides some details about a specific availability zone.

» Example Usage

» By State

# Declare the data source
data "aws_availability_zones" "available" {
  state = "available"

# e.g. Create subnets in the first two available availability zones

resource "aws_subnet" "primary" {
  availability_zone = data.aws_availability_zones.available.names[0]

  # ...

resource "aws_subnet" "secondary" {
  availability_zone = data.aws_availability_zones.available.names[1]

  # ...

» By Filter

All Local Zones (regardless of opt-in status):

data "aws_availability_zones" "example" {
  all_availability_zones = true

  filter {
    name   = "opt-in-status"
    values = ["not-opted-in", "opted-in"]

Only Availability Zones (no Local Zones):

data "aws_availability_zones" "example" {
  filter {
    name   = "opt-in-status"
    values = ["opt-in-not-required"]

» Argument Reference

The following arguments are supported:

  • all_availability_zones - (Optional) Set to true to include all Availability Zones and Local Zones regardless of your opt in status.
  • blacklisted_names - (Optional, DEPRECATED) List of Availability Zone names to exclude. Use exclude_names instead.
  • blacklisted_zone_ids - (Optional, DEPRECATED) List of Availability Zone IDs to exclude. Use exclude_zone_ids instead.
  • filter - (Optional) Configuration block(s) for filtering. Detailed below.
  • exclude_names - (Optional) List of Availability Zone names to exclude.
  • exclude_zone_ids - (Optional) List of Availability Zone IDs to exclude.
  • state - (Optional) Allows to filter list of Availability Zones based on their current state. Can be either "available", "information", "impaired" or "unavailable". By default the list includes a complete set of Availability Zones to which the underlying AWS account has access, regardless of their state.

» filter Configuration Block

The following arguments are supported by the filter configuration block:

» Attributes Reference

In addition to all arguments above, the following attributes are exported:

  • group_names A set of the Availability Zone Group names. For Availability Zones, this is the same value as the Region name. For Local Zones, the name of the associated group, for example us-west-2-lax-1.
  • names - A list of the Availability Zone names available to the account.
  • zone_ids - A list of the Availability Zone IDs available to the account.

Note that the indexes of Availability Zone names and IDs correspond.