---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/21219#article
headline: "21219: 'To' phone number not verified"
url: https://www.twilio.com/docs/api/errors/21219
inLanguage: en
dateModified: 2025-12-18T21:40:49.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 21219: 'To' phone number not verified

Log Level: ERROR

## Description

You attempted to initiate an outbound phone call from a trial account, but the 'To' number you specified is not a verified number for your account. In order to make calls during a free trial, you must first verify your ownership of the phone number being called.

You can verify phone numbers from the [phone numbers section](/user/account/phone-numbers) of your account portal.