The following behaviors are not permitted on Twilio: Sending mass marketing or bulk messaging using Twilio long code phone numbersI know there are a LOT of products and services built around using Twilio long codes for SMS so what gives? I'm not sure if marketers don't know, don't care, or what... or does Twilio need to update their website?
Mobile carriers do not allow marketing SMS messages, whether solicited or not, to be sent on long codes (10-digit numbers).
Marketing messages may only be sent using shortcodes (special 5 or 6-digit numbers). If you're interested in a dedicated US shortcode please contact our sales team.
Mass marketing restrictions vary from country to country. Twilio does not support mass marketing on US or international phone numbers.
The reason I'm asking -- I want to use Twilio for SMS but this definitely concerns me...