> For the complete documentation index, see [llms.txt](https://docs.console.zenlayer.com/api-reference/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.console.zenlayer.com/api-reference/zec/cidr-block/describeipv6cidrs.md).

# DescribeIpv6Cidrs

## 1. API Description

This API (DescribeIpv6Cidrs) is used to query the IPv6 CIDR blocks under the account. Filtering by CIDR ID, region, name, and CIDR block, as well as tag filtering and pagination, are supported.

## 2. Input Parameters

The following request parameter list only provides API request parameters.

| Parameter Name  | Required | Type                                                    | Description                                                                                                                                                                              |
| --------------- | -------- | ------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| cidrIds         | No       | Array of String                                         | Filter by IPv6 CIDR block ID.                                                                                                                                                            |
| regionId        | No       | String                                                  | <p>Filter by the ID of the region where the CIDR block is located.</p><p>It can be obtained by calling <a href="/api-reference/zec/location/describeregions.md">DescribeRegions</a>.</p> |
| name            | No       | String                                                  | Filter by CIDR block name. Fuzzy search is supported.                                                                                                                                    |
| cidrBlock       | No       | String                                                  | Filter by CIDR block address.                                                                                                                                                            |
| asn             | No       | Integer                                                 | Filter by ASN.                                                                                                                                                                           |
| resourceGroupId | No       | String                                                  | Filter by resource group ID.                                                                                                                                                             |
| pageSize        | No       | Integer                                                 | <p>The returned page size. Default value: 20. Maximum value: 1000.</p><p>Value range: \[1, 1000]</p>                                                                                     |
| pageNum         | No       | Integer                                                 | <p>Number of pages returned.</p><p>Value range: \[1, +)</p><p>Default value: 1</p>                                                                                                       |
| tagKeys         | No       | Array of String                                         | <p>Search by tag key.</p><p>You can query up to 20 tag keys in each request.</p>                                                                                                         |
| tags            | No       | Array of [Tag](/api-reference/zec/datastructure.md#tag) | <p>Search by tag.</p><p>You can query up to 20 tags in each request.</p>                                                                                                                 |

## 3. Output Parameters

| Parameter Name | Type                                                                      | Description                                                                                                           |
| -------------- | ------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------- |
| requestId      | String                                                                    | <p>The unique request ID, which is returned for each request.</p><p>RequestId is required for locating a problem.</p> |
| totalCount     | Integer                                                                   | Number of resources meeting the filtering conditions.                                                                 |
| dataSet        | Array of [Ipv6CidrInfo](/api-reference/zec/datastructure.md#ipv6cidrinfo) | Data for the list of IPv6 CIDR blocks.                                                                                |

## 4. Code Example

{% tabs %}
{% tab title="Example" %}
**1. Query the list of CIDR blocks whose CidrBlock is `2400:8a00::/28`.**

```json
POST /api/v2/zec HTTP/1.1
Host: console.zenlayer.com
Content-Type: application/json
X-ZC-Action: DescribeIpv6Cidrs
<Common Request Params>

Request：
{
    "cidrIds": ["xxx"],
    "regionId": "asia-east-1",
    "cidrBlock": "2400:8a00::/28",
    "pageSize": 10,
    "pageNum": 1
}

Response：
{
    "requestId": "T9CBB339D-5562-4451-81CF-31F10E6638B8",
    "response": {
        "dataSet": [
            {
                "asn": 62610,
                "cidrBlock": "2400:8a00::/28",
                "cidrId": "<cidrId>",
                "createTime": "2026-04-29T12:23:45Z",
                "name": "2400:8a00::/28",
                "netmask": 28,
                "networkLineType": "PremiumBGP",
                "nicIds": [
                    "<nicId1>",
                    "<nicId2>"
                ],
                "poolId": "<poolId>",
                "regionId": "asia-east-1",
                "resourceGroup": {
                    "resourceGroupId": "<resourceGroupId>",
                    "resourceGroupName": "<resourceGroupName>"
                },
                "source": "BYOIP",
                "status": "AVAILABLE",
                "subnetIds": [
                    "<subnetId1>",
                    "<subnetId2>"
                ],
                "asnObservation": {
                    "verificationStatus": "agreed",
                    "observedPrefix": "2400:8a00::/28",
                    "primarySource": "RIPE",
                    "primaryStatus": "FINISHED",
                    "primaryAsns": [62610]
                }
            }
        ],
        "requestId": "T9CBB339D-5562-4451-81CF-31F10E6638B8",
        "totalCount": 1
    }
}
```

{% endtab %}
{% endtabs %}

## 5. Developer Resources

Zenlayer Cloud API 2.0 integrates [SDKs](/api-reference/api-introduction/toolkit/api-sdk.md)，to make it easier for you to call APIs. More programming languages will be supported.

## 6. Error Codes

The following only lists the error codes related to the API business logic. For other error codes, see [Common Error Codes](/api-reference/api-introduction/instruction/commonerrorcode.md).

| HTTP Status Code | Error Code | Description |
| ---------------- | ---------- | ----------- |