bucketRegion

Limits the response to buckets that are located in the specified Amazon Web Services Region. The Amazon Web Services Region must be expressed according to the Amazon Web Services Region code, such as us-west-2 for the US West (Oregon) Region. For a list of the valid values for all of the Amazon Web Services Regions, see Regions and Endpoints.

Requests made to a Regional endpoint that is different from the bucket-region parameter are not supported. For example, if you want to limit the response to your buckets in Region us-west-2, the request must be made to an endpoint in Region us-west-2.