What is Hosted SMS?
Hosted SMS allows you to send and receive messages on voice-enabled numbers you already own with another carrier. It does not affect your voice capabilities of the number. We only register the number for SMS to route in and out of the platform.
What numbers can I host on Twilio for SMS?
Hosted SMS supports US and Canada in Beta. Mobile numbers are not supported. VoIP numbers from some providers will be supported in the future. Numbers already owned by a Twilio account for voice services cannot be hosted on another Twilio account for SMS services.