---
page_type: error
code: 21704
message: "21704: The Messaging Service contains no phone numbers"
level: ERROR
product: Programmable SMS
---

## Description

## Error - 21704

### The Messaging Service contains no senders.

A Messaging Service requires at least one phone number, Alphanumeric Sender ID or short code to send messages.

### Possible Causes

- Your Messaging Service does not contain any senders

### Possible Solutions

- Add at least one phone number or short code to your Messaging Service, or enable Alphanumeric Sender ID.