# DNS

## Get Passive DNS by IP

`client.Intel.DNS.List(ctx, params) (*V4PagePagination[DNS], error)`

**get** `/accounts/{account_id}/intel/dns`

Gets a list of all the domains that have resolved to a specific IP address.

### Parameters

- `params DNSListParams`

  - `AccountID param.Field[string]`

    Path param: Identifier.

  - `IPV4 param.Field[string]`

    Query param

  - `Page param.Field[float64]`

    Query param: Requested page within paginated list of results.

  - `PerPage param.Field[float64]`

    Query param: Maximum number of results requested.

  - `StartEndParams param.Field[DNSListParamsStartEndParams]`

    Query param

    - `End Time`

      Defaults to the current date.

    - `Start Time`

      Defaults to 30 days before the end parameter value.

### Returns

- `type DNS struct{…}`

  - `Count float64`

    Total results returned based on your search parameters.

  - `Page float64`

    Current page within paginated list of results.

  - `PerPage float64`

    Number of results per page of results.

  - `ReverseRecords []DNSReverseRecord`

    Reverse DNS look-ups observed during the time period.

    - `FirstSeen Time`

      First seen date of the DNS record during the time period.

    - `Hostname string`

      Hostname that the IP was observed resolving to.

    - `LastSeen Time`

      Last seen date of the DNS record during the time period.

### Example

```go
package main

import (
  "context"
  "fmt"

  "github.com/cloudflare/cloudflare-go"
  "github.com/cloudflare/cloudflare-go/intel"
  "github.com/cloudflare/cloudflare-go/option"
)

func main() {
  client := cloudflare.NewClient(
    option.WithAPIToken("Sn3lZJTBX6kkg7OdcBUAxOO963GEIyGQqnFTOFYY"),
  )
  page, err := client.Intel.DNS.List(context.TODO(), intel.DNSListParams{
    AccountID: cloudflare.F("023e105f4ecef8ad9ca31a8372d0c353"),
  })
  if err != nil {
    panic(err.Error())
  }
  fmt.Printf("%+v\n", page)
}
```

#### Response

```json
{
  "errors": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "messages": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "success": true,
  "result": {
    "count": 1,
    "page": 1,
    "per_page": 20,
    "reverse_records": [
      {
        "first_seen": "2021-04-01",
        "hostname": "hostname",
        "last_seen": "2021-04-30"
      }
    ]
  },
  "result_info": {
    "count": 1,
    "page": 1,
    "per_page": 20,
    "total_count": 2000
  }
}
```

## Domain Types

### DNS

- `type DNS struct{…}`

  - `Count float64`

    Total results returned based on your search parameters.

  - `Page float64`

    Current page within paginated list of results.

  - `PerPage float64`

    Number of results per page of results.

  - `ReverseRecords []DNSReverseRecord`

    Reverse DNS look-ups observed during the time period.

    - `FirstSeen Time`

      First seen date of the DNS record during the time period.

    - `Hostname string`

      Hostname that the IP was observed resolving to.

    - `LastSeen Time`

      Last seen date of the DNS record during the time period.