Describes attributes of your Amazon Web Services account. The following are the supported account attributes:

• supported-platforms: Indicates whether your account can launch instances into EC2-Classic and EC2-VPC, or only into EC2-VPC.

• default-vpc: The ID of the default VPC for your account, or none.

• max-instances: This attribute is no longer supported. The returned value does not reflect your actual vCPU limit for running On-Demand Instances. For more information, see On-Demand Instance Limits in the Amazon Elastic Compute Cloud User Guide.

• vpc-max-security-groups-per-interface: The maximum number of security groups that you can assign to a network interface.

• max-elastic-ips: The maximum number of Elastic IP addresses that you can allocate for use with EC2-Classic.

• vpc-max-elastic-ips: The maximum number of Elastic IP addresses that you can allocate for use with EC2-VPC.

We are retiring EC2-Classic on August 15, 2022. We recommend that you migrate from EC2-Classic to a VPC. For more information, see Migrate from EC2-Classic to a VPC in the Amazon EC2 User Guide.