I get calls almost daily from various versions of this number sequence:  01-1-408-888-8291, 408-888-829125, 88-882-9125, 888-882-9125, etc.  When it shows up on my phone, it's a long series of numbers (no dashes).  It rarely rings more than once before they hang up (before I get a chance to answer).  I've yet to answer it.  It's fishy that the number shows up as various lengths of that same basic sequence though and I'm super sick of it.