Amazon S3 supports global buckets. Therefore, each bucket name must be unique across all AWS accounts in all AWS Regions within a partition.

Explanation

Amazon S3 supports global buckets. Therefore, each bucket name must be unique across all AWS accounts in all AWS Regions within a partition. A partition is a grouping of Regions, of which AWS currently has three: Standard Regions, China Regions, and AWS GovCloud (US). When naming a bucket, choose a name that is relevant to you or your business. For example, you should avoid using AWS or Amazon in your bucket name.