21606: The 'From' phone number provided is not a valid message-capable Twilio phone number for this destination/account

You can only send SMS messages from a phone number, Alphanumeric Sender ID or short code provided by or ported to Twilio. Phone numbers must be SMS-capable. For Short Codes, the From number must be in the same country as the To number.

Visit the phone numbers page of your account portal to view a list of phone numbers that you own and to determine whether they are SMS-capable.

• The number you are using may not be capable of sending messages.
• The number may be formatted incorrectly. Twilio accepts numbers in E.164 format.
• If the number is a Short Code, it must be associated with the same country as the destination address.
• The number you are using is in the process of porting/hosting.
• The number you are using does not belong to the account whose credentials are present in the API request.

• Check that you are using a Twilio phone number with SMS capabilities. You can see your purchased phone numbers and their capabilities in the Twilio console.
• Ensure the number you are using is in E.164 format.
• If you are sending from a Short Code, verify that the country you are sending to matches the country of the Short Code.
• If you have ported/hosted the From number, ensure that the process is complete. You can follow up on this in the Twilio console for porting and hosting.
• Check that you are using account credentials that correspond with the account that owns the phone number.
• If you are sending messages with test credentials, verify that you are using one of the available test credential "magic phone numbers".