{"id":"subnet-cannot-span-availability-zones","text":"A VPC subnet must reside entirely within one Availability Zone — it cannot span multiple AZs.","truth_value":"IN","source":"entries/2026/03/08/vpc-subnets.md","source_url":"","source_hash":"d4faa1e970199eeb","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"subnet-cannot-span-availability-zones","truth_value":"IN","reason":"premise"}]}}