AWS October 19, 2025 Outage Explained

AWS’s massive one-day outage on October 19, 2025 finally has a root-cause analysis: a DNS failure triggered when DynamoDB lost its DNS records, which cascaded into EC2 and Network Load Balancer errors. The official RCA (released 10 days later) breaks down the timeline—starting with DNS at 5:30, EC2 at 13:41, and NLB at 16:16—for anyone who wants the full tech details.

Despite the chaos, AWS has documented every misstep so teams can learn and avoid similar pitfalls moving forward.

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