I've been getting a lot of calls from them lately.  This is just the recent number they've used.  They never leave a voice mail.  I'd finally had enough, so I called the number back to see what it was all about.  They said that the number was for WCA members, but they didn't recognize my number.  Probably random dialing without an actual number database.  I'm not going to bother trying to remove my number if it's supposedly not in their system.  I added my cell to the DNC.