# List hosted zones
aws route53 list-hosted-zones
aws route53 list-hosted-zones-by-name --dns-name example.com

# Create hosted zone
aws route53 create-hosted-zone \
  --name example.com --caller-reference $(date +%s)

# List records in zone
aws route53 list-resource-record-sets --hosted-zone-id Z123

# Create/update record (change batch)
aws route53 change-resource-record-sets --hosted-zone-id Z123 \
  --change-batch '{
    "Changes": [{
      "Action": "UPSERT",
      "ResourceRecordSet": {
        "Name": "www.example.com",
        "Type": "A",
        "TTL": 300,
        "ResourceRecords": [{"Value": "1.2.3.4"}]
      }
    }]
  }'

# Alias record (points to AWS resource — no TTL, no charge for queries)
aws route53 change-resource-record-sets --hosted-zone-id Z123 \
  --change-batch '{
    "Changes": [{
      "Action": "UPSERT",
      "ResourceRecordSet": {
        "Name": "app.example.com",
        "Type": "A",
        "AliasTarget": {
          "HostedZoneId": "Z35SXDOTRQ7X7K",
          "DNSName": "my-alb-123.us-east-1.elb.amazonaws.com",
          "EvaluateTargetHealth": true
        }
      }
    }]
  }'

# Health check
aws route53 create-health-check \
  --caller-reference $(date +%s) \
  --health-check-config Type=HTTPS,FullyQualifiedDomainName=www.example.com,Port=443,ResourcePath=/health

aws route53 list-health-checks
aws route53 get-health-check-status --health-check-id xxx