You can now easily change the Amazon Virtual Private Cloud (Amazon VPC) used by your Amazon RDS DB instance. You can specify a new VPC for an existing DB instance deployed in Single-AZ configuration by using the Amazon RDS Management Console, the Amazon RDS API, or the AWS Command Line Tools. In addition, if you are running your DB instance on the EC2-Classic environment, you can switch to the EC2-VPC environment by modifying your existing DB instance. If your AWS account was created before 2013-12-04, you are potentially running RDS on the EC2-Classic environment.