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Alibaba Cloud DNS:GetMainDomainName

Last Updated:Sep 09, 2025

Retrieves the primary domain name from a specified domain name.

Operation description

For more information about primary and subdomain name levels, see Domain name levels. For example, if you enter www.abc.com, the output is abc.com.

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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:GetMainDomainName

get

*All Resource

*

None None

Request parameters

Parameter

Type

Required

Description

Example

Lang

string

No

The language of the response. Valid values:

  • zh: Chinese

  • en: English

Default: zh

en

InputString

string

Yes

The domain name.

www.example.com

Response elements

Element

Type

Description

Example

object

RR

string

The host record.

www

RequestId

string

The unique request ID.

536E9CAD-DB30-4647-AC87-AA5CC38C5382

DomainName

string

The domain name.

example.com

DomainLevel

integer

The level of the input domain name.

2

Examples

Success response

JSON format

{
  "RR": "www",
  "RequestId": "536E9CAD-DB30-4647-AC87-AA5CC38C5382",
  "DomainName": "example.com",
  "DomainLevel": 2
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.