All Products
Search
Document Center

Alibaba Cloud DNS:UnbindInstanceDomains

Last Updated:Sep 09, 2025

Detaches domain names from a paid Alibaba Cloud DNS instance.

Operation description

An instance with an ID that starts with `dns-` is a new version instance. New version instances support attaching multiple domain names. You can call an API operation to attach domain names directly to an instance. An error is returned if the number of domain names exceeds the instance limit.
An instance with an ID that does not start with `dns-` is a legacy instance. Legacy instances support only one domain name. Therefore, if you call this operation for an instance that already has a domain name attached, the domain name is replaced.



Try it now

Try this API in OpenAPI Explorer, no manual signing needed. Successful calls auto-generate SDK code matching your parameters. Download it with built-in credential security for local usage.

Test

RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

  • Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.

  • API: The API that you can call to perform the action.

  • Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.

  • Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.

    • For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.

    • For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.

  • Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.

  • Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

alidns:UnbindInstanceDomains

update

*Instance

acs:alidns:*:{#accountId}:instance/{#InstanceId}

*Domain

acs:alidns:*:{#accountId}:domain/{#DomainName}

None None

Request parameters

Parameter

Type

Required

Description

Example

Lang

string

No

The language of the request and response. Default value: zh. Valid values:

  • zh: Chinese

  • en: English

en

DomainNames

string

Yes

The list of domain names.

Separate multiple domain names with commas (,). You can specify up to 100 domain names. For more information, see DescribeDomains.

example.com,example.net

InstanceId

string

Yes

The ID of the authoritative domain name instance. For more information, see ListCloudGtmInstances.

dns-cn-9lb38ldq9**

Response elements

Element

Type

Description

Example

object

RequestId

string

The unique ID of the request.

123

FailedCount

integer

The number of domain names that failed to be detached.

0

SuccessCount

integer

The number of domain names that were successfully detached.

2

Examples

Success response

JSON format

{
  "RequestId": "123",
  "FailedCount": 0,
  "SuccessCount": 2
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.