Attributes
| number_pool_uuid | Unique identifier for the number pool. |
| number | String. |
| type | The type of number. One of: fixed, mobile, toll-free. |
| service | The service capability of number. One of: sms, mms. |
| country_iso2 | The ISO2 code of the country associated with the number. |
| added_on | Timestamp in ISO 8601 format. |
| account_phone_number_resource | Account phone number resource URI. |