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Amazon Elastic Compute Cloud
User Guide for Windows Instances

Resource Locations

The following table describes which Amazon EC2 resources are global, regional, or based on Availability Zone.

Resource Type Description

AWS account

Global

You can use the same AWS account in all regions.

Key pairs

Global or Regional

You can use the key pairs that you create using Amazon EC2 only in the region where you created them. You can create and upload an RSA key pair that you can use in all regions.

For more information, see Amazon EC2 Key Pairs and Windows Instances.

Amazon EC2 resource identifiers

Regional

Each resource identifier, such as an AMI ID, instance ID, EBS volume ID, or EBS snapshot ID, is tied to its region and can be used only in the region where you created the resource.

User-supplied resource names

Regional

Each resource name, such as a security group name or key pair name, is tied to its region and can be used only in the region where you created the resource. Although you can create resources with the same name in multiple regions, they aren't related to each other.

AMIs

Regional

An AMI is tied to the region where its files are located within Amazon S3. You can copy an AMI from one region to another. For more information, see Copying an AMI.

Elastic IP addresses

Regional

An Elastic IP address is tied to a region and can be associated only with an instance in the same region.

Security groups

Regional

A security group is tied to a region and can be assigned only to instances in the same region. You can't enable an instance to communicate with an instance outside its region using security group rules. Traffic from an instance in another region is seen as WAN bandwidth.

EBS snapshots

Regional

An EBS snapshot is tied to its region and can only be used to create volumes in the same region. You can copy a snapshot from one region to another. For more information, see Copying an Amazon EBS Snapshot.

EBS volumes

Availability Zone

An Amazon EBS volume is tied to its Availability Zone and can be attached only to instances in the same Availability Zone.

Instances

Availability Zone

An instance is tied to the Availability Zones in which you launched it. However, note that its instance ID is tied to the region.