They called on 1 number and tried to send fax on another, all from same number. We have both numbers listed with DO-NOT-CALL registry.

same as Debbie posted...answered,caller ID said CONCERNED CIT, no one there, tried calling back but only got series of tones,,,,,

the caller id says CONCERNED CIT.  They called at 11:30 pm on 4/22 and hung up and again at 4:30 pm on 4/23 and hung up.  If I try to call them back, I hear touch tone numbers and then nothing.