---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/32204#article
headline: "32204: SIP: 'From' phone number not verified"
url: https://www.twilio.com/docs/api/errors/32204
inLanguage: en
dateModified: 2026-03-11T20:01:16.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 32204: SIP: 'From' phone number not verified

Log Type: APPLICATION

Log Level: ERROR

## Description

You attempted to initiate an outbound phone call, but the From number you specified is not a verified Outgoing Caller ID for your account. In order to use a phone number as the Caller ID on outgoing calls, you must first validate your ownership of that phone number.

### Possible causes

The `From` number used to make outbound call not a Twilio number or not a verified caller ID

### Possible solutions

Change the callerID used in the From field of the SIP INVITE to a Twilio number on your account or verify your number by visiting the Console [Verified Caller IDs](/user/account/phone-numbers/verified) or REST API.