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Amazon S3 introduces account regional namespaces for general purpose buckets

Posted on: Mar 16, 2026

You can now create general purpose buckets in your own reserved namespace, eliminating the need to find globally unique bucket names and making it easier to build workloads that utilize a bucket per customer, team, or dataset. With account regional namespaces, you can create predictable bucket names across multiple Amazon Web Services Regions with assurance that no other account can create bucket names in your namespace.

Account regional namespaces help simplify bucket creation and management as your data storage needs grow in size and scope. You can easily update your Amazon CloudFormation templates or bucket creation code to create buckets in your account regional namespace. To get started, add the new bucket namespace request header when creating buckets through the CreateBucket API and include your unique account regional suffix in the requested name. Cloud security teams can use service control policies (SCP) and IAM policies to enforce that users only create buckets in their account regional namespace, helping teams enforce consistent bucket naming practices across their enterprise.

Account regional namespaces for S3 general purpose buckets are now available in 37  Amazon Web Services Regions, including the Amazon Web Services China (Beijing) Region, operated by Sinnet, and the Amazon Web Services China (Ningxia) Region, operated by NWCD. You can get started at no additional cost using the Amazon Web Services Management Console, Amazon SDKs, or Amazon CloudFormation templates. To learn more, visit the S3 User Guide.