import Telnyx from 'telnyx';

const client = new Telnyx({
  apiKey: process.env['TELNYX_API_KEY'], // This is the default and can be omitted
});

const associatedPhoneNumber = await client.portingOrders.associatedPhoneNumbers.delete(
  '182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e',
  { porting_order_id: '182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e' },
);

console.log(associatedPhoneNumber.data);

{
  "data": {
    "id": "f24151b6-3389-41d3-8747-7dd8c681e5e2",
    "porting_order_id": "a24151b6-3389-41d3-8747-7dd8c681e5e2",
    "country_code": "GB",
    "phone_number_type": "local",
    "phone_number_range": {
      "start_at": "+441234567890",
      "end_at": "+441234567899"
    },
    "action": "keep",
    "record_type": "porting_associated_phone_number",
    "created_at": "2021-03-19T10:07:15.527Z",
    "updated_at": "2021-03-19T10:07:15.527Z"
  }
}