Who called from 2027113413

I answered the phone and it started ringing agian & someone from (it sounded like the Carribean) another country answered...I stated you called me & hung up. We are starting to get strange calls from unknown numbers like this...what is going on?

this number is unknown, when I answered, they hung up.

More of the same - phone rings, and when I answered, some sort of "click", then they hung up.