# Release phone number

> Release a phone number. The phone number must not be assigned to a sender.

`DELETE https://api.zavu.dev/v1/phone-numbers/{phoneNumberId}`

Release a phone number. The phone number must not be assigned to a sender.

## Parameters

- `phoneNumberId` (path, string, required)

## Responses

### 204

Phone number released.

### 400

Cannot release phone number assigned to a sender.

- `code` (string, required)
- `message` (string, required)
- `details` (object)

### 401

Unauthorized.

- `code` (string, required)
- `message` (string, required)
- `details` (object)

### 404

Phone number not found.

- `code` (string, required)
- `message` (string, required)
- `details` (object)

## Example

```bash
curl -X DELETE "https://api.zavu.dev/v1/phone-numbers/phone_number_abc123" \
  -H "Authorization: Bearer $ZAVUDEV_API_KEY"
```

```typescript
import Zavudev from "@zavudev/sdk";

const zavu = new Zavudev({ apiKey: process.env.ZAVUDEV_API_KEY });

await zavu.phoneNumbers.release("phone_number_abc123");
```