Who I have the same questioned this topic

This past month I have gotten several text messages from random numbers from @ vztext.com or @ vzwpix.com.  Normally, they are all similar text with, "Who's this?", or "Who are you?".  Well today I got two, "WRONG NUMBER [removal required by the Verizon Wireless Terms of Service] (Attachment removed)" and " [removed] (Attachment removed)".

I'm worried my number was hacked and is spamming other numbers or is this just a phishing attempt?  In the meantime, I blocked all web text.