Orders a number for your workspace and starts its monthly charge. Pass a number from `GET /v1/numbers/available`. Whether the number is already in inventory or acquired from a supplier, the response contains an order. Most orders complete immediately and return `201` with `status` of `completed` and `number_id` populated. Read the number with `GET /v1/numbers/{number_id}`. An order that cannot complete in the request returns `202`; poll `GET /v1/numbers/orders/{order_id}` until it is `completed` or `failed`. A `412` means the workspace has not completed the identity verification required to acquire a sender. Complete it, then retry. The number to acquire, in E.164 format, as returned by `GET /v1/numbers/available`. Identifier of this purchase order. The number being acquired, in E.164 format. Physical type of the number being acquired. Identifier of the number this order produced, set when `status` is `completed`. Pass it as `number_id` to `GET /v1/numbers/{number_id}` or `DELETE /v1/numbers/{number_id}`. `null` until the order completes. Human-readable reason the purchase failed. `null` unless status is failed. An order can fail some time after it was created, so `updated_at` tells you when the failure was recorded rather than when the order was placed. When the purchase completed and the number became owned (status completed). `null` for orders still in progress or failed.