Queries the regions where network instances can be attached to a Cloud Enterprise Network (CEN) instance.


The regions that support CEN vary based on the network instance type. To query the regions where you can attach a specified type of network instances to CEN, set the ProductType parameter. If you do not set the ProductType parameter, the system queries all regions where you can attach network instances to CEN, regardless of the network instance type.


OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters

Parameter Type Required Example Description
Action String No DescribeChildInstanceRegions

The operation that you want to perform. Set the value to DescribeChildInstanceRegions.

ProductType String No VPC

The network instance type. Valid values:

  • VPC: virtual private cloud (VPC)
  • VBR: virtual border router (VBR)
  • CCN: Cloud Connect Network (CCN) instance

Response parameters

Parameter Type Example Description
Regions Array of Region

The list of regions.

LocalName String China (Hangzhou)

The name of the region.

RegionId String cn-hangzhou

The ID of the region.

RequestId String D5CEED59-36AA-47CC-9D81-16F71C46BD80

The ID of the request.


Sample requests

&<Common request parameters>

Sample success responses

XML format

              <LocalName>China (Hangzhou)</LocalName>

JSON format

    "RequestId": "D5CEED59-36AA-47CC-9D81-16F71C46BD80",
    "Regions": {
        "Region": [
                "RegionId": "cn-hangzhou",
                "LocalName": "China (Hangzhou)"

Error codes

For a list of error codes, visit the API Error Center.