I just received my first and should be only text from them. I have Sprint service. I send them a text to 9999 with the message - Spam
[email protected]
The message I get from them is that number is now blocked from sending me other messages :)
The number they leave is the 919 number, so I came on this site to look it up and post this message.
I don't know how AT&T or Verizon handle spam calls/texts.