title: Can a single NAT Gateway span across multiple AZ?
body: <p>When I configure a NAT Gateway, I will have to select a subnet, hence to my understanding, one NAT Gateway for one Subnet which falls under one Availability Zones.</p>
  
  <p>Then I saw the below statement</p>
  
  <blockquote>
    <p>If you have resources in multiple Availability Zones and they share one NAT gateway, in the event that the NAT gateway's Availability Zone is down, resources in the other Availability Zones lose internet access, To create an Availability Zone-independent architecture, create a NAT gateway in each Availability Zone and configure your routing to ensure that resources use the NAT gateway in the same Availability Zone.</p>
  </blockquote>
  
  <p>If I have multiple EC2 in different subnets, how do they share a single NAT Gateway? Did I understand wrongly? Below is the screenshot I see when I try to create a NAT Gateway</p>
  
  <p><a href="https://i.stack.imgur.com/wjD5z.png" rel="noreferrer"><img src="https://i.stack.imgur.com/wjD5z.png" alt="enter image description here"></a></p>