Every day I receive at least 4 or 5 of these nuisance calls. When I get these calls, I do not answer, usually, there is no message left. Thank goodness I have call blocking on my Panasonic phone, otherwise the same number will call back a couple of times. My call blocking only holds 30 calls. Every once in a while, I need to clear the numbers I have blocked in order to be able to use the device again. At the present time I have 21 blocked calls that I saved. I used to go online & report the calls, however, there were so many I gave up. My friends say they noticed they get more of these calls since they registered with Do Not Call. Could this be?