POST

/#Action=AssociateVpcCidrBlock

http://ec2.{region}.amazonaws.com/#Action=AssociateVpcCidrBlock

Associates a CIDR block with your VPC. You can associate a secondary IPv4 CIDR block, an Amazon-provided IPv6 CIDR block, or an IPv6 CIDR block from an IPv6 address pool that you provisioned through bring your own IP addresses (<a href="https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-byoip.html">BYOIP</a>). The IPv6 CIDR block size is fixed at /56. You must specify one of the following in the request: an IPv4 CIDR block, an IPv6 pool, or an Amazon-provided IPv6 CIDR block. For more information about associating CIDR blocks with your VPC and applicable restrictions, see <a href="https://docs.aws.amazon.com/vpc/latest/userguide/VPC_Subnets.html#VPC_Sizing">VPC and subnet sizing</a> in the Amazon Virtual Private Cloud User Guide.

Access Token Required: API Key

Query Params

Actionstringrequired

Allowed:

Versionstringrequired

Allowed:

Responses

{
  "success": true,
  "data": {
    "id": "abc123",
    "created_at": "2025-01-01T00:00:00Z"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters"
  }
}

Language

CredentialsAPI KEY

API Key

Enter token below to save for later

cURL Request

1curl --request POST \
2     --url 'http://ec2.{region}.amazonaws.com/#Action=AssociateVpcCidrBlock' \
3     --header 'accept: application/json' \
4     --header 'content-type: application/json'

Response

1{
2  "success": true,
3  "data": {
4    "id": "abc123",
5    "created_at": "2025-01-01T00:00:00Z"
6  }
7}