---
page_type: error
code: 21264
message: "21264: ‘From’ phone number not verified"
level: ERROR
---

## Description

You received an inbound phone call to a Twilio phone number owned by your trial account, but the 'From' number is not a [Verified Caller ID](https://support.twilio.com/hc/en-us/articles/223180048-How-to-Add-and-Remove-a-Verified-Phone-Number-or-Caller-ID-with-Twilio) on your account. In order to receive calls to a Twilio number during a free trial, you must first verify your ownership of the phone number that is placing the call.

### Possible Causes

The 'From' number of the inbound call is not a [Verified Caller ID](https://support.twilio.com/hc/en-us/articles/223180048-How-to-Add-and-Remove-a-Verified-Phone-Number-or-Caller-ID-with-Twilio). Trial accounts can only receive inbound calls from verified phone numbers.

### Possible Solutions

You can verify phone numbers from the [phone numbers section](https://www.twilio.com/user/account/phone-numbers) of your account portal.