I got a couple of calls from (253) 292-2704, I picked up the phone without saying anything waiting for the other end to say something, but no one say anything.  I hangup.   Later I decided to call back that number, then I got message saying "press one to remove from calling list".  I pressed 1.  But within two hours, another call from 253-292-3383 called.  Both displayed ID as Tacoma, WA.   I blocked both numbers from my end.