Hmm... for all 10 digit US numbers the telcos introduce 10 DLC registrations last year that require you to register and verify your business in order to send an

Hmm... for all 10 digit US numbers the telcos introduce 10 DLC registrations last year that require you to register and verify your business in order to send any meaningful amount of SMS traffic. You have to provide details like a DUNs number, an EIN, and addresses that match those registrations. https://support.bandwidth.com/hc/en-us/articles/1500002422242-10DLC-Overview https://support.bandwidth.com/hc/en-us/articles/150000242224... They haven't gotten to blocking messages that don't register but have raised the fees and fines for folks who don't register and they're able to track down.