Who Called My Phone?

How do I find out who called me with a blocked number on my cell phone?

Someone just called me with wierd caller ID. The number was 571 and it’s obvious it was a fake but when I answered they asked for me and I paniced and said they had the wrong number. I want to find out how to call them back and block my number. Does anyone know how do do these things using a cell phone?

put *67 in front of the number.,.. lol it probly was out of state doesnt mean it was fake