---
page_type: error
code: 21711
message: >-
  21711: Phone Number, Shortcode, Destination AlphaSender, and Global
  AlphaSender is not associated to the specified Messaging Service.
level: WARNING
product: Programmable SMS
---

## Description

## Error - 21711

### Phone Number, Shortcode, Destination AlphaSender, and Global AlphaSender is not associated to the specified Messaging Service.

### Possible Causes

- The sender was never associated with a given Messaging Service.

### Possible Solutions

Please add this number to a specified Messaging Service. [See here](/docs/messaging/services/api/phonenumber-resource#create-a-phonenumber-resource-add-a-phone-number-to-a-messaging-service) for a code sample.