Who called from 5034571264

answered call from the above number on the second ring.  After saying "Hello",  I listened to silence,  no response for about 4 seconds.  I never give a second hello to silent calls I usually just hang up but this time I keyed in a few #'s and *s before hanging up.  I read somewhere that that confuses the tele-computers.

503 457-1264
received call from them on SUNDAY - said hello, no one there - I hung-up

this showed up as a cell phone on my caller ID