---
title: List Hostname Associations
---

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[API Reference](https://developers.cloudflare.com/api/go)

[Certificate Authorities](https://developers.cloudflare.com/api/go/resources/certificate_authorities)

[Hostname Associations](https://developers.cloudflare.com/api/go/resources/certificate_authorities/subresources/hostname_associations)

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# List Hostname Associations

client.CertificateAuthorities.HostnameAssociations.Get(ctx, params) (\*[HostnameAssociationGetResponse](<https://developers.cloudflare.com/api/go/resources/certificate_authorities#(resource)%20certificate_authorities.hostname_associations%20%3E%20(model)%20HostnameAssociationGetResponse%20%3E%20(schema)>), error)

GET/zones/{zone\_id}/certificate\_authorities/hostname\_associations

List Hostname Associations.

##### Security

<details>

<summary>API Token</summary>



The preferred authorization scheme for interacting with the Cloudflare API. <a href="https://developers.cloudflare.com/fundamentals/api/get-started/create-token/">Create a token</a>.

**Example:**<code>Authorization: Bearer Sn3lZJTBX6kkg7OdcBUAxOO963GEIyGQqnFTOFYY</code>

</details>

<details>

<summary>API Email + API Key</summary>



The previous authorization scheme for interacting with the Cloudflare API, used in conjunction with a Global API key.

**Example:**<code>X-Auth-Email: user@example.com</code>

The previous authorization scheme for interacting with the Cloudflare API. When possible, use API tokens instead of Global API keys.

**Example:**<code>X-Auth-Key: 144c9defac04969c7bfad8efaa8ea194</code>

</details>

##### Accepted Permissions (at least one required)

`SSL and Certificates Write``SSL and Certificates Read`

##### ParametersExpand Collapse

<details>

<summary>

params HostnameAssociationGetParams

</summary>

ZoneID param.Field\[string]

Path param: Identifier.

maxLength32

<a href="#(resource)%20certificate_authorities.hostname_associations%20%3E%20(method)%20get%20%3E%20(params)%20default%20%3E%20(param)%20zone_id">Link to this property</a>

MTLSCertificateID param.Field\[string]Optional

Query param: The UUID to match against for a certificate that was uploaded to the mTLS Certificate Management endpoint. If no mtls\_certificate\_id is given, the results will be the hostnames associated to your active Cloudflare Managed CA.

maxLength36

minLength36

<a href="#(resource)%20certificate_authorities.hostname_associations%20%3E%20(method)%20get%20%3E%20(params)%20default%20%3E%20(param)%20mtls_certificate_id">Link to this property</a>

</details>

[Link to this property](<#(resource)%20certificate_authorities.hostname_associations%20%3E%20(method)%20get%20%3E%20(params)%20default>)

##### ReturnsExpand Collapse

<details>

<summary>

type HostnameAssociationGetResponse struct{…}

</summary>

Hostnames \[]stringOptional

<a href="#(resource)%20certificate_authorities.hostname_associations%20%3E%20(model)%20HostnameAssociationGetResponse%20%3E%20(schema)%20%3E%20(property)%20hostnames">Link to this property</a>

</details>

[Link to this property](<#(resource)%20certificate_authorities.hostname_associations%20%3E%20(model)%20HostnameAssociationGetResponse%20%3E%20(schema)>)

### List Hostname Associations

Go

HTTPTypeScriptPythonGoTerraform

```
package main

import (
  "context"
  "fmt"

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

func main() {
  client := cloudflare.NewClient(
    option.WithAPIToken("Sn3lZJTBX6kkg7OdcBUAxOO963GEIyGQqnFTOFYY"),
  )
  hostnameAssociation, err := client.CertificateAuthorities.HostnameAssociations.Get(context.TODO(), certificate_authorities.HostnameAssociationGetParams{
    ZoneID: cloudflare.F("023e105f4ecef8ad9ca31a8372d0c353"),
  })
  if err != nil {
    panic(err.Error())
  }
  fmt.Printf("%+v\n", hostnameAssociation.Hostnames)
}
```

200 example

```
{
  "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": {
    "hostnames": [
      "api.example.com"
    ]
  }
}
```

##### Returns Examples

200 example

```
{
  "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": {
    "hostnames": [
      "api.example.com"
    ]
  }
}
```