Route 53 Files lets you access AWS hosted zones as a native file system on EC2, ECS, EKS, or Lambda. It uses NFS v4.1, so you can create, read, update, and delete DNS records using standard UNIX commands. Changes sync automatically between the file system and Route 53, with about 90 seconds to go live and up to 6 minutes for global visibility.

It supports concurrent access with last-write-wins conflict resolution, ideal for AI agents or on-call engineers. To start, create a file system in the console, specify your AWS account and hosted zone IDs, and mount it on an instance. The generated tarball contains IAM policies; you can audit the code for security.