Guillermo
I have answered and they just hang up. I also get tons of calls from these numbers:
732-374-3399
732-374-3396
732-374-3869
732-898-3609
732-339-3869
732-339-3488
732-339-3215
732-339-3215
They all are from New Jersey, they hang up when answered and they don't leave a message when I don't answer.