To send business information to several clients at the same time through SMS is known as Bulk SMS. Bulk SMS is sent either via transactional process or Promotional process.
In transactional sms we provide six characters alphabetic sender id, with unlimited validity. You can send transactional sms on DND and Non DND number as well. But there is limitation in promotional process you can’t send it on DND number. We have large data base to fulfill your requirement.