> For a complete index of all SignalWire documentation pages, fetch https://signalwire.com/docs/llms.txt

# List number group memberships

GET https://%7BYour_Space_Name%7D.signalwire.com/api/relay/rest/number_groups/{NumberGroupId}/number_group_memberships

Lists the project-owned phone numbers that belong to one Number Group. Use it to understand which senders make up the pool; use [List phone numbers](/docs/apis/rest/phone-numbers/list-phone-numbers) for all numbers owned by the project.

#### Permissions

The API token used to authenticate must have the following scope(s) enabled to make a successful request: _Numbers_.

[Learn more about API scopes](/docs/platform/your-signalwire-api-space).

Reference: https://signalwire.com/docs/apis/rest/number-groups/list-number-group-memberships

## Authentication

- `Authorization` header (basic auth, required) — SignalWire Basic Authentication using Project ID and API Token. The client sends HTTP requests with the Authorization header containing the word Basic followed by a space and a base64-encoded string of project_id:token. The project ID will be used as the username and the API token as the password. Example: ``` Authorization: Basic base64(project_id:token) ```

## Request

### Path parameters

- `NumberGroupId` (string, required) — Unique ID of the number group.

### Query parameters

- `page_number` (integer, optional, default: 0) — The page number to retrieve.
- `page_size` (integer, optional, default: 50) — The number of results per page.
- `page_token` (string, optional) — Token for cursor-based pagination.

## Response

### 200

The request has succeeded.

- `links` (object, required) — Pagination links.
  - `self` (string, required) — Link to the current page.
  - `first` (string, required) — Link to the first page.
  - `next` (string, optional) — Link to the next page. Only present when there are more results.
  - `prev` (string, optional) — Link to the previous page. Only present when not on the first page.
- `data` (list of object, required) — List of number group memberships.
  - `id` (string, required) — The unique identifier of the Number Group Membership on SignalWire. This can be used to delete the membership programmatically.
  - `number_group_id` (string, required) — The unique identifier of the Number Group this membership is associated with.
  - `phone_number` (object, required) — A representation of the phone number this membership is associated with.
    - `id` (string, optional) — The unique identifier of the phone number.
    - `name` (string, optional) — The name given to the phone number.
    - `number` (string, optional) — The phone number in E.164 format.
    - `capabilities` (list of string, optional) — The capabilities of the phone number.
  - `created_at` (string, required) — The date and time when the membership was created.
  - `updated_at` (string, required) — The date and time when the membership was last updated.

## Examples

**Response**

```json
{
  "links": {
    "self": "string",
    "first": "string",
    "next": "string",
    "prev": "string"
  },
  "data": [
    {
      "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
      "number_group_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
      "phone_number": {
        "id": "string",
        "name": "Jenny",
        "number": "+15558675309",
        "capabilities": [
          "voice",
          "sms",
          "mms",
          "fax"
        ]
      },
      "created_at": "2023-01-15T10:30:00Z",
      "updated_at": "2023-01-15T10:30:00Z"
    }
  ]
}
```

**SDK Code**

```python
import requests

url = "https://{your_space_name}.signalwire.com/api/relay/rest/number_groups/NumberGroupId/number_group_memberships"

response = requests.get(url, auth=("<project_id>", "<api_token>"))

print(response.json())
```

```javascript
const url = 'https://{your_space_name}.signalwire.com/api/relay/rest/number_groups/NumberGroupId/number_group_memberships';
const credentials = btoa("<project_id>:<api_token>");

const options = {method: 'GET', headers: {Authorization: `Basic ${credentials}`}};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://{your_space_name}.signalwire.com/api/relay/rest/number_groups/NumberGroupId/number_group_memberships"

	req, _ := http.NewRequest("GET", url, nil)

	req.SetBasicAuth("<project_id>", "<api_token>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("https://{your_space_name}.signalwire.com/api/relay/rest/number_groups/NumberGroupId/number_group_memberships")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)
request.basic_auth("<project_id>", "<api_token>")

response = http.request(request)
puts response.read_body
```

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.get("https://{your_space_name}.signalwire.com/api/relay/rest/number_groups/NumberGroupId/number_group_memberships")
  .basicAuth("<project_id>", "<api_token>")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('GET', 'https://{your_space_name}.signalwire.com/api/relay/rest/number_groups/NumberGroupId/number_group_memberships', [
  'headers' => [
  ],
    'auth' => ['<project_id>', '<api_token>'],
]);

echo $response->getBody();
```

```csharp
using RestSharp;
using RestSharp.Authenticators;

var client = new RestClient("https://{your_space_name}.signalwire.com/api/relay/rest/number_groups/NumberGroupId/number_group_memberships");
client.Authenticator = new HttpBasicAuthenticator("<project_id>", "<api_token>");
var request = new RestRequest(Method.GET);

IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let credentials = Data("<project_id>:<api_token>".utf8).base64EncodedString()

let headers = ["Authorization": "Basic \(credentials)"]

let request = NSMutableURLRequest(url: NSURL(string: "https://{your_space_name}.signalwire.com/api/relay/rest/number_groups/NumberGroupId/number_group_memberships")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "GET"
request.allHTTPHeaderFields = headers

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```