Resource IDs
When resources are created, we assign each resource a unique resource ID. A resource ID
takes the form of a resource identifier (such as snap for a snapshot) followed
by a hyphen and a unique combination of letters and numbers.
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.
You can use resource IDs to find your resources in the Amazon EC2 console. If you are using a command line tool or the Amazon EC2 API to work with Amazon EC2, resource IDs are required for certain commands. For example, if you are using the stop-instances Amazon CLI command to stop an instance, you must specify the instance ID in the command.
Resource ID length
Prior to January 2016, the IDs assigned to newly created resources of certain resource
types used 8 characters after the hyphen (for example, i-1a2b3c4d). From January
2016 to June 2018, we changed the IDs of these resource types to use 17 characters
after the hyphen (for example, i-1234567890abcdef0). Depending on when
your account was created, you might have resources of the following resource types
with short IDs, though any new resources of these types receive the longer
IDs:
bundle
conversion-task
customer-gateway
dhcp-options
elastic-ip-allocation
elastic-ip-association
export-task
flow-log
image
import-task
instance
internet-gateway
network-acl
network-acl-association
network-interface
network-interface-attachment
prefix-list
route-table
route-table-association
security-group
snapshot
subnet
subnet-cidr-block-association
reservation
volume
vpc
vpc-cidr-block-association
vpc-endpoint
vpc-peering-connection
vpn-connection
vpn-gateway