I have been receiving calls from this number for months, and received 4 in one day this week. I called them back late last night and got the answering service saying it was Apple Telemarketing. I left them a message stating that we are on the Do Not Call register, and I would appreciate it if they would stop calling me again and again and again. I also said that even if it was for a charity (exempt from the Do Not Call list), I was sorry, but not interested. I also said "thank you very much for your co-operation" before hanging up - and yes, I left my full number and name so that they can track my details down and remove them as I have requested. I believe they do a lot of charity calls, and I have answered the calls in the past - they are usually asking me to sell raffle tickets, but I absolutely hate doing that and now just ignore them when I see their number. Hopefully they will stop calling as I have politely told them I don't want them to!