Sorry to be a nuisance, I have had five nuisance calls during the last 24 hours. I am registered with Do Not Call, and have had several nuisance callers' numbers blocked per Unwelcome Calls (Telstra)......but am still getting calls from various numbers........I cannot trace who the callers are and I have no idea why they keep calling, I don't even answer the calls....so I'll list them with Unwelcome Calls also, ... Unwelcome Calls Customer Service staff are very helpful, and have told me a lot of these nuisance calls actually come from computers and are showing false telephine numbers on the screen.........I just wish they would stop!