I've had a several of calls purporting to be from Amazon, to my landline.
They're a recorded message, inevitably to do with some item I have recently purchased, which has been recalled and I am entitled to a full refund (or some such yarn) if only I press '1'.
As Amazon don't have and have never had my landline number, I decline their generous invitation and hang up.
In fact, because of the large number of calls like this to my landline, I've taken to not answering it.
I can always 1471-it, and it is easy enough to subsequently check whether it is a number that is known to me.