# Regions and availability zones (AZ) #level100 #cur #finops ## Source - [AWS documentation](https://aws.amazon.com/about-aws/global-infrastructure/regions_az/) ## Relevant notes - Sometimes also referred to as location in the CUR - [[AWS region code]] ## Notes - A region is a cluster of datacentres located in the same country or city. - An Availability Zone (AZ) can be seen as a single datacentre in a region - AZ should be far enough from each other not to be impacted by most disasters with a reduced blast radius (think plane crash, but not earthquake) but close enough to allow for ultra-low latency networking.