What is the service for sending single SMS from different numbers?

Question

SMS

Hello. I looked at a bunch of sites, even registered on some, but either no SMS was sent, or they substituted text instead of the outgoing number .. If in 2 words, then some services appeared where instead of entering the code that came to your number, send SMS to him from his number with a long code. It is necessary that the service has a substitution of random (or in turn) numbers for the system on the site to determine that the SMS came from a real phone.

Answer 1

Is there a one-time SMS service?