How to add a verified outbound caller ID with Twilio
To verify new outgoing caller ID numbers, you can either use the Console or the REST API.
To use your Console, log into your Twilio account and visit the Verified Caller IDs page. Click the + button at the top of the page.
To use the REST API, POST your phone number to the Outgoing Caller IDs list resource.
All numbers purchased from Twilio or ported over to us are already verified as caller IDs.