Other website postings say this is the Multiple Sclerosis Society, doing fundraising calls via a rented telemarketing call centre that specializes in charities. In Canada, these are exempt from the Do Not Call Registry regulations. However, due to the volume of scammer calls these days, look up the charity and call the published number if you wish to get involved rather than giving personal information to any 'Unknown Caller' rented number.
My number is on the do not call list and they asked for me by name. I stated that I wanted my number removed and the woman kept on talking. I finally, after stating that I wanted my number removed from the list several times, hung up.