How do I find out if my Amazon EC2 Reserved Instance provides Regional benefits or size flexibility?

Resolution

All Amazon EC2 Reserved Instances that are size flexible also provide the Regional benefit, but the reverse isn't always true.

For a Reserved Instance to provide the Regional benefit, the following must be true:

• It's not a Standard or Convertible Reserved Instance.
• It's in the active state.
• It's not tied to a specific Availability Zone.

For a Reserved Instance to be size flexible, the following must be true:

• It meets the Regional benefit criteria.
• It has a platform value of Linux/UNIX.
• It supports instance size flexibility.
• It doesn't have a dedicated tenancy.

A Reserved Instance that provides the Regional benefit applies to any instance in that Region that matches the specifications of the Reserved Instance.

A Reserved Instance that's size-flexible applies all or part of its pricing benefit to any instance in the same instance family. This is true no matter the Availability Zone or size.

For example, a Reserved Instance that's size-flexible for a c4.large instance applies to either a c4.large instance or two c4.medium instances. In the same way, two c4.medium instances can also be applied to usage for a c4.large instance.

Related information

Reserved Instances for Amazon EC2 overview

How Reserved Instance discounts are applied

Types of Reserved Instances (offering classes)