AWS Billing and Cost Management
User Guide (Version 2.0)

Reservation Details

You can use the reservation columns to find out more about a reserved resource. The columns include but are not limited to the following:


The Availability Zone of the resource associated with this line item.


The number of reservations covered by this subscription. For example, one Reserved Instance (RI) subscription may have four associated RI reservations.


The ARN of the Reserved Instance that this line item benefitted from.


The total number of reserved units in the subscription. In the case of a Reserved Instance (RI), this is the total number of hours across all RIs in this subscription. This is calculated by multiplying the NumberOfReservations by the UnitsPerReservation.


The number of usage units reserved by a single reservation in a given subscription, such as how many hours a single Amazon EC2 RI has reserved.