2025-10-20: "It was DNS" - problems in the AWS zone "us-east-1" cause a havoc on the internet.

As Amazon is one of the largest cloud providers, issues in their “AWS” cloud affect many other services. The issue was in the “us-east-1” zone. As “us-east-1” is the first compartment of AWS, many services still run exclusively in “us-east-1” or on this particular zone. The services began to recover since 11:30 (CET).

Outside of Amazon's own services — like Prime Video and “global AWS features” — the outage impacted Epic Games, various Apple services, Atlassian services, Docker, Snapchat, Roblox, Robinhood, Coinbase, McDonald's app, and even the Signal messenger (this list is not comprehensive).

According to Amazon, the root cause were problems with the DNS (domain name) resolution of its DynamoDB product. This product is apparently used internally by various “global features”, such as IAM (identity access management). “During this time, customers may be unable to create or update Support Cases.”