> For the complete documentation index, see [llms.txt](https://docs.ionos.com/cloud/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ionos.com/cloud/~/revisions/bM7yG7XCmGE9IxWqMpBu/managed-services/cloud-dns/api-how-tos/create-and-manage-reverse-dns.md).

# Create and manage a Reverse DNS record

{% hint style="info" %}
**Notes:**

* Only contract administrators, owners, and users with **accessAndManageDns** privilege can create and manage DNS zones and DNS records via the API. You can also set User privileges in the [<mark style="color:blue;">DCD</mark>](/cloud/~/revisions/bM7yG7XCmGE9IxWqMpBu/managed-services/cloud-dns/dcd-how-tos/set-user-privileges.md).
* Sub-users can create Reverse DNS records only if the user group they belong to has access to the concerned IP block. For more information, see [<mark style="color:blue;">Add users to a group</mark>](/cloud/~/revisions/bM7yG7XCmGE9IxWqMpBu/getting-started/basic-tutorials/manage-user-access.md#add-users-to-a-group).
* Currently, the [<mark style="color:blue;">Cloud DNS API</mark>](https://api.ionos.com/docs/dns/v1/) supports only IPv4 addresses for Reverse DNS records.
* To create a reverse DNS entry for IPv6 addresses, please contact [<mark style="color:blue;">IONOS Cloud Support</mark>](https://docs.ionos.com/support/general-information/contact-information).
  {% endhint %}

### Prerequisites

{% hint style="info" %}

* You need an IONOS Cloud account with API credentials configured with the appropriate permissions.
* Before creating a Reverse DNS record, you must create an A record for the IP address you want to use for the reverse DNS record. For more information, see [<mark style="color:blue;">Create a DNS Record</mark>](/cloud/~/revisions/bM7yG7XCmGE9IxWqMpBu/managed-services/cloud-dns/api-how-tos/create-dns-record.md).
  {% endhint %}

To create a Reverse DNS Record with [<mark style="color:blue;">Cloud DNS API</mark>](https://api.ionos.com/docs/dns/v1/), follow this step:

* Perform a POST request with name, a description of reverse DNS record (optional), and the IP.

{% hint style="info" %}
**Note:** The IP address must be from a reserved IP range. To reserve an IP address, click **Menu** > **Management** > **IP Management**. Enter a name and the number of IP addresses, and select a region where you want your IP addresses to be reserved. Click **Reserve IP** to reserve the IP address, and confirm the reservation by pressing **OK**.
{% endhint %}

{% hint style="success" %}
**Result:** On a successful POST request, you receive a response containing the reverse DNS record UUID, type, href, metadata, properties of your reverse DNS record, name, description, and IP address.
{% endhint %}

### Request

```bash
curl --location \  
--request POST  'https://dns.de-fra.ionos.com/reverserecords' \
--header 'Authorization: Bearer eyJ0eXAiOiJKV1QiLCJraWQiO' \
--header 'Content-Type: application/json' \
--data '{
      "properties": {
        "name": "mail.example.com",
        "description": "The reverse DNS record is used for mail.example.com",
        "ip": "5.6.7.8"
  }
}'
```

### Response

**200 Successful operation**

```json
{
  "id": "e74d0d15-f567-4b7b-9069-26ee1f93bae3",
  "type": "reverserecord",
  "href": "<RESOURCE-URI>",
  "metadata": {
    "lastModifiedDate": "2022-08-21T15:52:53Z",
    "createdDate": "2022-08-21T15:52:53Z"
  },
  "properties": {
    "name": "mail.example.com",
    "description": "The reverse DNS record is used for mail.example.com",
    "ip": "5.6.7.8"
  }
}
```

#### Response Fields

| Field                | Type   | Description                                  | Example                                             |
| -------------------- | ------ | -------------------------------------------- | --------------------------------------------------- |
| **id**               | string | UUID of the newly created reverse DNS record | 2a4428b3-dbe0-4357-9c02-609025b3a40f                |
| **createdDate**      | string | Reverse DNS record creation timestamp        | 2023-03-15T09:58:59.147746133Z                      |
| **lastModifiedDate** | string | Reverse DNS record update timestamp          | 2023-03-15T09:58:59.147746133Z                      |
| **name**             | string | Name of the reverse DNS record               | mail.example.com                                    |
| **description**      | string | Description of the reverse DNS record        | The reverse DNS record is used for mail.example.com |
| **ip**               | string | IP address of the reverse DNS record         |                                                     |
| **type**             | string | Type of the reverse DNS record               | reverserecord                                       |
| **href**             | string | URL to the reverse DNS record                |                                                     |

## Retrieve all reverse DNS records

To retrieve all reverse DNS records, perform a GET request to the `/reverserecords` endpoint.

{% hint style="success" %}
**Result:** On a successful GET request, you receive a response containing all reverse DNS records.
{% endhint %}

### Request

```bash
curl --location 'https://dns.de-fra.ionos.com/reverserecords' \
--header 'Authorization: Bearer eyJ0eXAiOiJKV1QiLCJraWQiO' \
--header 'Content-Type: application/json'
```

### Response

**200 Successful operation**

```json
{
  "type": "collection",
  "href": "<RESOURCE-URI>",
  "items": [
    {
      "id": "e74d0d15-f567-4b7b-9069-26ee1f93bae3",
      "type": "reverserecord",
      "href": "<RESOURCE-URI>",
      "metadata": {
        "lastModifiedDate": "2022-08-21T15:52:53Z",
        "createdDate": "2022-08-21T15:52:53Z"
      },
      "properties": {
        "name": "mail.example.com",
        "description": "The reverse DNS record is used for mail.example.com",
        "ip": "5.6.7.8"
      }
    }
  ],
  "offset": 0,
  "limit": 1000,
  "_links": {
    "prev": "http://PREVIOUS-PAGE-URI",
    "self": "http://THIS-PAGE-URI",
    "next": "http://NEXT-PAGE-URI"
  }
}
```

#### Response Fields

| Field                | Type   | Description                           | Example                                             |
| -------------------- | ------ | ------------------------------------- | --------------------------------------------------- |
| **id**               | string | UUID of the reverse DNS record        | 2a4428b3-dbe0-4357-9c02-609025b3a40f                |
| **createdDate**      | string | Reverse DNS record creation timestamp | 2023-03-15T09:58:59.147746133Z                      |
| **lastModifiedDate** | string | Reverse DNS record update timestamp   | 2023-03-15T09:58:59.147746133Z                      |
| **name**             | string | Name of the reverse DNS record        | mail.example.com                                    |
| **description**      | string | Description of the reverse DNS record | The reverse DNS record is used for mail.example.com |
| **ip**               | string | IP address of the reverse DNS record  |                                                     |
| **type**             | string | Type of the reverse DNS record        | reverserecord                                       |
| **href**             | string | URL to the reverse DNS record         |                                                     |

## Retrieve a reverse DNS record

To retrieve a reverse DNS record, perform a GET request to the `/reverserecords/{id}` endpoint.

{% hint style="success" %}
**Result:** On a successful GET request, you receive a response containing the reverse DNS record UUID, type, href, metadata, and properties of your reverse DNS record, name, description, and IP.
{% endhint %}

### Request

```bash
curl -X 'GET' \
  'https://dns.de-fra.ionos.com/reverserecords/e74d0d15-f567-4b7b-9069-26ee1f93bae3' \
  --header 'Authorization: Bearer eyJ0eXAiOiJKV1QiLCJraWQiO' \
  -H 'accept: application/json'
```

### Response

**200 Successful operation**

```json
{
  "id": "e74d0d15-f567-4b7b-9069-26ee1f93bae3",
  "type": "reverserecord",
  "href": "<RESOURCE-URI>",
  "metadata": {
    "lastModifiedDate": "2022-08-21T15:52:53Z",
    "createdDate": "2022-08-21T15:52:53Z"
  },
  "properties": {
    "name": "mail.example.com",
    "description": "The reverse DNS record is used for mail.example.com",
    "ip": "5.6.7.8"
  }
}
```

#### Response Fields

| Field                | Type   | Description                           | Example                                             |
| -------------------- | ------ | ------------------------------------- | --------------------------------------------------- |
| **id**               | string | UUID of the reverse DNS record        | 2a4428b3-dbe0-4357-9c02-609025b3a40f                |
| **createdDate**      | string | Reverse DNS record creation timestamp | 2023-03-15T09:58:59.147746133Z                      |
| **lastModifiedDate** | string | Reverse DNS record update timestamp   | 2023-03-15T09:58:59.147746133Z                      |
| **name**             | string | Name of the reverse DNS record        | mail.example.com                                    |
| **description**      | string | Description of the reverse DNS record | The reverse DNS record is used for mail.example.com |
| **ip**               | string | IP address of the reverse DNS record  |                                                     |
| **type**             | string | Type of the reverse DNS record        | reverserecord                                       |
| **href**             | string | URL to the reverse DNS record         |                                                     |

## Modify a reverse DNS record

To modify a reverse DNS record, perform a PUT request to the `/reverserecords/{id}` endpoint.

{% hint style="success" %}
**Result:** On a successful PUT request, you receive a response containing the reverse DNS record UUID, type, href, metadata, and properties of your reverse DNS record, name, description, and IP.
{% endhint %}

### Request

```bash
curl -X 'PUT' \
  'https://dns.de-fra.ionos.com/reverserecords/e74d0d15-f567-4b7b-9069-26ee1f93bae3' \
  --header 'Authorization: Bearer eyJ0eXAiOiJKV1QiLCJraWQiO' \
  -H 'accept: application/json' \
  -H 'Content-Type: application/json' \
  -d '{
  "properties": {
    "name": "mail.example.com",
    "description": "The reverse DNS record is used for mail.example.com",
    "ip": "1.2.3.4"
  }
}'
```

### Response

**200 Successful operation**

```json
{
  "id": "e74d0d15-f567-4b7b-9069-26ee1f93bae3",
  "type": "reverserecord",
  "href": "<RESOURCE-URI>",
  "metadata": {
    "lastModifiedDate": "2022-08-21T15:52:53Z",
    "createdDate": "2022-08-21T15:52:53Z"
  },
  "properties": {
    "name": "mail.example.com",
    "description": "The reverse DNS record is used for mail.example.com",
    "ip": "1.2.3.4"
  }
}
```

#### Response Fields

| Field                | Type   | Description                           | Example                                             |
| -------------------- | ------ | ------------------------------------- | --------------------------------------------------- |
| **id**               | string | UUID of the reverse DNS record        | 2a4428b3-dbe0-4357-9c02-609025b3a40f                |
| **createdDate**      | string | Reverse DNS record creation timestamp | 2023-03-15T09:58:59.147746133Z                      |
| **lastModifiedDate** | string | Reverse DNS record update timestamp   | 2023-03-15T09:58:59.147746133Z                      |
| **name**             | string | Name of the reverse DNS record        | mail.example.com                                    |
| **description**      | string | Description of the reverse DNS record | The reverse DNS record is used for mail.example.com |
| **ip**               | string | IP address of the reverse DNS record  |                                                     |
| **type**             | string | Type of the reverse DNS record        | reverserecord                                       |
| **href**             | string | URL to the reverse DNS record         |                                                     |

## Delete a reverse DNS record

To delete a reverse DNS record, perform a DELETE request to the `/reverserecords/{id}` endpoint.

{% hint style="success" %}
**Result:** On a successful DELETE request, you receive a HTTP response **202 Successful operation**.
{% endhint %}

### Request

```bash
curl -X 'DELETE' \
  'https://dns.de-fra.ionos.com/reverserecords/e74d0d15-f567-4b7b-9069-26ee1f93bae3' \
  --header 'Authorization: Bearer eyJ0eXAiOiJKV1QiLCJraWQiO' \
  -H 'accept: application/json'
```

### Response

**202 Successful operation**

## Quota

To retrieve the quota of reverse DNS records, perform a GET request to the `/quota` endpoint.

{% hint style="success" %}
**Result:** On a successful GET request, you receive a response containing the quota limits and quota usage for your contract.
{% endhint %}

### Request

```bash
curl --location 'https://dns.de-fra.ionos.com/quota' \
--header 'Authorization: Bearer eyJ0eXAiOiJKV1QiLCJraWQiO' \
--header 'Content-Type: application/json'
```

### Response

**200 OK**

```json
{
  "quotaLimits": {
    "records": 100000,
    "reverseRecords": 5000,
    "secondaryZones": 100000,
    "zones": 50000
  },
  "quotaUsage": {
    "records": 9,
    "reverseRecords": 1,
    "secondaryZones": 6,
    "zones": 5
  }
}
```

#### Response Fields

| Field              | Type   | Description                        | Example |
| ------------------ | ------ | ---------------------------------- | ------- |
| **records**        | string | Number of DNS records              | 100000  |
| **reverseRecords** | string | Number of reverse DNS records      | 5000    |
| **secondaryZones** | string | Number of secondary DNS zones      | 100000  |
| **zones**          | string | Number of DNS zones                | 50000   |
| **records**        | string | Number of DNS records used         | 9       |
| **reverseRecords** | string | Number of reverse DNS records used | 1       |
| **secondaryZones** | string | Number of secondary DNS zones used | 6       |
| **zones**          | string | Number of DNS zones used           | 5       |


---

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