# ec2-instances-in-vpc
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**Important**  
For this rule, the rule identifier (INSTANCES\$1IN\$1VPC) and rule name (ec2-instances-in-vpc) are different.

Checks if your EC2 instances belong to a virtual private cloud (VPC). Optionally, you can specify the VPC ID to associate with your instances.



**Identifier:** INSTANCES\$1IN\$1VPC

**Resource Types:** AWS::EC2::Instance

**Trigger type:** Configuration changes

**AWS Region:** All supported AWS regions

**Parameters:**

vpcId (Optional)Type: String  
VPC ID that contains these EC2 instances.

## AWS CloudFormation template
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To create AWS Config managed rules with AWS CloudFormation templates, see [Creating AWS Config Managed Rules With AWS CloudFormation Templates](aws-config-managed-rules-cloudformation-templates.md).