---
page_type: error
code: 22500
message: "22500: Twilio phone number using deprecated API version"
level: ERROR
product: Phone Numbers
---

## Description

Phone Numbers no longer supports 2008-08-01 API. The Twilio phone number is configured for the deprecated 2008-08-01 API, which is not compatible. Update the phone number API version to 2010-04-01

### Possible Causes

The Twilio phone number is configured for the 2008-08-01 API

### Possible Solutions

Update the phone number API version to 2010-04-01 or later version