---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/22117#article
headline: "22117: Invalid Extension"
url: https://www.twilio.com/docs/api/errors/22117
inLanguage: en
dateModified: 2026-03-11T20:01:16.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 22117: Invalid Extension

Log Level: ERROR

## Description

The extension provided for the verification call contains characters that aren't allowed.

### Possible solutions

* Confirm that your Extension is a non-empty string. Extension may contain numbers, the # and \* characters, as well as the "w" character to "wait" for half a second.