I also got calls from this number, and another unknown "212." When I called the other number back, I got the Met. I am a Met subscriber, so this all makes sense now.
They called me again today, so I picked up and got a live person--he was from the Met. I complained to him that I had received multiple hang-up calls from the number in the past few days and had found out on line that many other people were frustrated with the same. He said they are having a problem with multiple operations doing sales calls (?) but that he would take my number off the list. We'll see.
Oh, and the calls are to solicit donations.