name : describe-identity-id-format.rst **To describe the ID format for an IAM role** The following ``describe-identity-id-format`` example describes the ID format received by instances created by the IAM role ``EC2Role`` in your AWS account. :: aws ec2 describe-identity-id-format \ --principal-arn arn:aws:iam::123456789012:role/my-iam-role \ --resource instance The following output indicates that instances created by this role receive IDs in long ID format. :: { "Statuses": [ { "Deadline": "2016-12-15T00:00:00Z", "Resource": "instance", "UseLongIds": true } ] } **To describe the ID format for an IAM user** The following ``describe-identity-id-format`` example describes the ID format received by snapshots created by the IAM user ``AdminUser`` in your AWS account. :: aws ec2 describe-identity-id-format \ --principal-arn arn:aws:iam::123456789012:user/AdminUser \ --resource snapshot The output indicates that snapshots created by this user receive IDs in long ID format. :: { "Statuses": [ { "Deadline": "2016-12-15T00:00:00Z", "Resource": "snapshot", "UseLongIds": true } ] }