---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/21203#article
headline: "21203: International calling not enabled"
url: https://www.twilio.com/docs/api/errors/21203
inLanguage: en
dateModified: 2025-12-18T21:40:49.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 21203: International calling not enabled

Log Level: ERROR

## Description

You attempted to initiate an outbound phone call to an international phone number, which is not currently supported.