List all AWS availability zones

az.bash

#!/usr/bin/env bash

# List all AWS availability zones
#
# Depends on:
#  - `aws`: https://aws.amazon.com/cli/ (installed and configured with credentials)
#  - `jq`:  https://stedolan.github.io/jq/
#
for REGION in $(
  aws ec2 describe-regions | jq --raw-output '.Regions | map(.RegionName) | .[]' | sort
); do
  aws ec2 describe-availability-zones --region "$REGION" | 
  jq --raw-output '.AvailabilityZones | map(.ZoneName) | .[]' |
  sort

  echo
done