## Set Account Custom Nameserver Related Zone Metadata

`client.Zones.CustomNameservers.Update(ctx, params) (*SinglePage[string], error)`

**put** `/zones/{zone_id}/custom_ns`

Set metadata for account-level custom nameservers on a zone.

If you would like new zones in the account to use account custom nameservers by default, use PUT /accounts/:identifier to set the account setting use_account_custom_ns_by_default to true.

Deprecated in favor of [Update DNS Settings](https://developers.cloudflare.com/api/operations/dns-settings-for-a-zone-update-dns-settings).

### Parameters

- `params CustomNameserverUpdateParams`

  - `ZoneID param.Field[string]`

    Path param: Identifier.

  - `Enabled param.Field[bool]`

    Body param: Whether zone uses account-level custom nameservers.

  - `NSSet param.Field[float64]`

    Body param: The number of the name server set to assign to the zone.

### Returns

- `type CustomNameserverUpdateResponseEnvelopeResult string`

  Unused

### Example

```go
package main

import (
  "context"
  "fmt"

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

func main() {
  client := cloudflare.NewClient(
    option.WithAPIToken("Sn3lZJTBX6kkg7OdcBUAxOO963GEIyGQqnFTOFYY"),
  )
  page, err := client.Zones.CustomNameservers.Update(context.TODO(), zones.CustomNameserverUpdateParams{
    ZoneID: 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": [],
  "result_info": {
    "count": 1,
    "page": 1,
    "per_page": 20,
    "total_count": 2000
  }
}
```