Skip to contentSkip to navigationSkip to topbar
Page tools
Useful for sharing or LLM
Accelerate development with AI

On this pageProducts used
Looking for more inspiration?Visit the
Error
Application error

32204: SIP: 'From' phone number not verified

Twilio Elastic SIP Trunking DocumentationSIP Trunking

Description

description page anchor

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

possible-causes page anchor

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

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 or REST API.