> 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/bmc/cidr-block/unbindcidrblockips.md).

# UnbindCidrBlockIps

## 1. API Description

This API (UnbindCidrBlockIps) is used to unbind one or more CIDR block IPs from instances. \*\*\*.

## 2. Input Parameters

The following request parameter list only provides API request parameters.

| Parameter Name | Required | Type            | Description                                                                                                     |
| -------------- | -------- | --------------- | --------------------------------------------------------------------------------------------------------------- |
| ipList         | Yes      | Array of String | List of IPs to be unassigned.                                                                                   |
| cidrBlockId    | Yes      | String          | <p>ID of the CIDR block.</p><p>You can find the cidrBlockId in the response by calling DescribeCidrBlocks .</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> |

## 4. Code Example

{% tabs %}
{% tab title="Example" %}
Unassign a CIDR block IP from the instance.

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

Request:
{
  "cidrBlockId": "cidrBlockId",
  "ipList": [
    "2602:ffe4:1:11::1"
  ]
}

Response:
{
  "requestId": "TEE694662-1428-4330-91ED-9D5800206E20",
  "response": {
    "requestId": "TEE694662-1428-4330-91ED-9D5800206E20"
  }
}
```

{% 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                                                        |
| ---------------- | -------------------------------------- | ------------------------------------------------------------------ |
| 403              | OPERATION\_DENIED\_CIDRBLOCK\_RECYCLED | This operation is not supported for CIDR block in the recycle bin. |
| 403              | OPERATION\_DENIED\_SERVER\_EXIST\_IPV6 | The specified instance has an IPv6 address configured.             |
| 403              | OPERATION\_DENIED\_IP\_NOT\_BELONG     | The IP to be unbound does not belong to the specified CIDR block.  |
| 403              | OPERATION\_DENIED\_INVALID\_STATUS     | The current state of the IP does not support unbinding.            |