---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/22401#article
headline: "22401: Phone Number Instance fields are not supported within region"
url: https://www.twilio.com/docs/api/errors/22401
inLanguage: en
dateModified: 2026-03-11T18:38:39.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 22401: Phone Number Instance fields are not supported within region

Log Type: APPLICATION

Log Level: ERROR

## Description

The fields you are attempting to update are not supported within the region specified.

### Possible causes

The feature is not supported within the region.

### Possible solutions

Please refer to documentation to understand which fields are supported.