416-000-xxxx,
I get them several times a day, everyday. I don't answer them. Everyone I know also gets these calls, all of them trace them back to some factory/warranty/car company with no name. Like all of you, they get asked personal information.
Likewise, I've gotten a call from a 416-000-xxxx (7796, 7793, 3971) number at least once a day for the past three or four days, and then a couple times a week for the past two weeks...first time I picked it up I got the vehicle warranty recording, but I haven't picked it up since. Someone told me that they charge you money the longer you listen to the recording? No idea if this is true or not, but almost everyone I know who has a cellphone has gotten this call now, plus my family's home phone.
I am getting calls like this from past 2-3 weeks but I never annswer since I have pay as you go phone. I put my phone in no call list so after 30 days I wont get any call.