AWS DNS Outage Deep Dive

On October 19, 2025, AWS suffered a DNS failure that knocked services offline for over a day. Ten days later, the official root-cause analysis revealed exactly what went wrong and why DynamoDB lost its DNS entries.

The accompanying video breaks it down with a quick summary at 0:00, Dynamo’s DNS collapse at 5:30, EC2 errors at 13:41, and Network Load Balancer hiccups at 16:16. Check out the full RCA here: https://aws.amazon.com/message/101925/

Watch on YouTube