Had some fun with them. When they asked for my Credit Card number I made one up. I could hear him typing the number on a keyboard. A few minutes went by and he started getting nervous. He asked for the number again and I gave him one that was two digits different. This iteration went on for about 15 minutes. He eventually called me a liar and hung up!
Just got a call from (718) 409-1107
NY, USA but I did not answer & I'm reading the replies but not a single reply saying it is an important number, oh well