I am sure they notice you haven't contacted and like Rob said above at first they are relieved. But then it will kick in and they will wonder why? Did something happen? Are you moving on? Are you happy?
Remember though, the 180 and NC is for YOU!!!! For you to get healthier.
Me: 46 FWS: 36 Married and Divorced 4/07, Pregnant 7/07,False R 7/07 Baby Girl born 3/08 Kicked him out because OW: 7/08 5/10 He realized what he had and lost. Moved home! REMARRIED 3/14/11!!