Who called from 4166194160

want to know who is calling from this number, or who is using this number.

This number called today but when I tried calling it back it says to put in a access code

this number keeps on calling my boyfriends cell and leaves stupid messages on the voice mail as if  shes his girlfriend...and when i called back its asking for authorization code

i was just wondering, was it a girl who called you?

Unknown Caller